Teacher:In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Teacher: Now, understand the problem? Solve this instance: Media playback is unsupported on your device Media caption The trees were discovered at the Queen's official residence in Scotland 
  
 Trees believed to have been extinct in Britain have been discovered at the Queen's official residence in Scotland. 
  
 The two 100ft Wentworth elms have been identified in the Queen's garden at the Palace of Holyroodhouse in Edinburgh. 
  
 Despite being among the most photographed trees in the garden, the breed was only identified during a recent tree survey. 
  
 Tree experts are now looking into ways of propagating the rare specimens, Ulmus Wentworthii Pendula. 
  
 'Removing diseased elms' 
  
 Dr Max Coleman, of the Royal Botanic Garden Edinburgh (RBGE), told the BBC's Good Morning Scotland radio programme: "That's the most striking thing about this story. It seems very odd on the face of it that these massive trees, that are probably the most photographed trees in the grounds of the palace, have gone unrecognised until now. 
  
 "I think the reason is that firstly they were never common, these Wentworth elms. If you pull your tree book off the shelf to try and look them up, you won't find Wentworth elm listed in the books. 
  
 "Secondly, and probably more importantly, there are relatively few people these days that are familiar with elm trees and unfortunately the reason for that is that since the 1970s we've lost somewhere between 25 and 75 million elms across the UK as a whole due to Dutch Elm Disease." 
  
 Image copyright PA 
  
 Dr Coleman said affirmative action by the local council had probably preserved the trees. 
  
 "It is very likely the only reason these rare elms have survived is because City of Edinburgh Council has been surveying and removing diseased elms since the 1980s. 
  
 "Without that work many more of the thousands of elms in Edinburgh would have been lost. 
  
 "The success of this programme may be partly demonstrated in the way two rare trees have been preserved." 
  
 The trees grow with a "weeping" appearance and have large glossy leaves. 
  
 Scientists said the Wentworth elm was most likely introduced to cultivation in the late 19th century but it was thought to have been wiped out in the Dutch elm disease epidemic during the late 20th century. 
  
 Image copyright PA 
  
 While the palace trees have been identified, it is not yet clear where the two specimens came from. 
  
 Curators and archivists at the royal household and RBGE are now working to find out more about their origins. 
  
 One theory is that the trees arrived at Holyrood from RBGE and survived while their Botanic Garden sibling died. 
  
 Archives already show that three Wentworth elms arrived at the Botanic Garden from Germany in 1902, after which all subsequent records refer to a single tree at the garden. The single Wentworth elm died in 1996 when it succumbed to Dutch elm disease. 
  
 Dr Coleman said: "It is very tempting to speculate that the Wentworth elms at the palace are the two missing trees from RBGE. 
  
 "There is anecdotal evidence that the young trees could have come in to RBGE, then been grown-on before planting-out in their final positions. 
  
 Image copyright PA Image caption Dr Max Coleman examines the leaves on one of two 100ft Wentworth elms 
  
 "Certainly, there was a close relationship between the palace and the garden in the early 20th century and the head gardener at Holyrood, William Smith, had trained here. 
  
 "Although we have no record here of elms going out, we know that a large number of ivy plants went from here to Holyrood to plant round the abbey ruins." 
  
 Alan Keir, Holyrood Park and gardens manager for Historic Environment Scotland (HES), which maintains the palace gardens, said: "When RBGE got in touch to ask if we could facilitate a walk round the gardens to find cultivars for propagation, we were happy to help - but certainly didn't expect them to find these rare specimens hidden in plain sight. 
  
 "The HES gardens team have undertaken careful maintenance of these specimens over the past several years, including crown reduction and limb bracing works, and we're proud to help look after the only remaining examples of these trees in Britain." ||||| Tree experts have been excited by the “discovery” of two mature specimens – until now thought to be extinct in Britain – within Her Majesty The Queen’s garden at the Palace of Holyroodhouse, a stone’s throw away from Edinburgh city centre. Now thoughts are turning to propagation of the rare royal 100ft-tall Wentworth elms (Ulmus 'Wentworthii Pendula). 
  
 An attractive cultivar with a “weeping” habit of growth and large glossy leaves, the Wentworth elm was probably introduced to cultivation in the late 19th century. But it was thought to have been wiped-out in the devastating Dutch elm disease epidemic that destroyed between 25 and 75 million trees in Britain during the late 20th century. 
  
 “Such a discovery when the trees in question are just shy of 100 feet and in plain sight does sound rather odd”, conceded Dr Max Coleman of the Royal Botanic Garden Edinburgh (RBGE) who identified the specimens after they were noted as being unusual during a tree survey. 
  
 “It is very likely the only reason these rare elms have survived is because Edinburgh City Council has been surveying and removing diseased elms since the 1980s. Without that work many more of the thousands of elms in Edinburgh would have been lost. The success of this programme may be partly demonstrated in the way two rare trees have been preserved.” 
  
 Alan Keir, Holyrood Park and Gardens Manager for Historic Environment Scotland, who maintain the Palace Gardens said: “When RBGE got in touch to ask if we could facilitate a walk round the gardens to find cultivars for propagation, we were happy to help - but certainly didn’t expect them to find these rare specimens hidden in plain sight! The HES gardens team have undertaken careful maintenance of these specimens over the past several years, including crown reduction and limb bracing works, and we’re proud to help look after the only remaining examples of these trees in Britain.” 
  
 But, while Dr Coleman’s research has been conclusive in determining what they are, where the Wentworth elms came from retains an element of mystery. Now, the detective work is being extended to include research by curators and archivists at the Royal Household, RBGE and beyond. And the likeliest suggestion, in another bizarre twist, is that the trees arrived at Holyrood from RBGE – and survived while their Botanic Garden sibling died. 
  
 The archives have revealed that three Wentworth elms arrived at RBGE from Germany in 1902, after which all subsequent records refer to a single tree at the Garden. The single Wentworth elm died in 1996 when it succumbed to Dutch elm disease. 
  
 “It is very tempting to speculate that the Wentworth elms at the Palace are the two missing trees from RBGE”, surmised Dr Coleman. “There is anecdotal evidence that the young trees could have come in to RBGE then been grown-on before planting-out in their final positions. Certainly, there was a close relationship between the Palace and the Garden in the early 20th century and the head gardener at Holyrood, William Smith, had trained here. And, although we have no record here of elms going out, we know that a large number of ivy plants went from here to Holyrood to plant round the abbey ruins.” 
  
 Whatever the true provenance of the Holyrood Wentworth elms, the story is not yet set to end. The potential of propagation is being considered, with horticulturists now keen to take the story forward into a new era. Should that go ahead and be successful, this majestic weeping tree would be secured for future generations to appreciate. ||||| Two “extinct” Wentworth elms have been discovered at Holyrood Palace. The free-standing tree to the right of the palace is one of them. (Image: Carol Walker/CC BY-SA 2.0) 
  
 During a recent survey of trees in the Queen’s garden at the Palace of Holyroodhouse in Edinburgh, Scotland, botanists were shocked to discover the presence of two elms thought to be extinct for nearly a half century. 
  
 The two trees belong to a species known as the Wentworth elm, and scientists thought it had gone extinct last century on account of the Dutch elm disease epidemic. 
  
 “Such a discovery when the trees in question are just shy of 100 feet and in plain sight does sound rather odd.” 
  
 Turns out they were wrong—but what a strange place for the last two remnants of this majestic breed to be located. It’s not as if these things are tiny saplings, or trees tucked away out of sight. They’re absolutely huge and are among the most photographed trees on the palace grounds. 
  
 One of two Wentworth elms recently found at Holyrood. (Image: Max Coleman/CC BY-SA 4.0) 
  
 “Such a discovery when the trees in question are just shy of 100 feet and in plain sight does sound rather odd,” admitted Max Max Coleman of the Royal Botanic Garden Edinburgh (RBGE) in a release. Coleman identified the specimens after they were flagged as being unusual during a recent tree survey. The trees have a weeping-like appearance, and feature large glossy leaves. 
  
 So rare, even experts had trouble identifying the tree. (Image: Max Coleman/CC BY-SA 4.0) 
  
 Speaking to the BBC, Coleman speculated that the oversight could be blamed on the fact that these trees were never common in the first place. “If you pull your tree book off the shelf to try and look them up, you won’t find Wentworth elm listed in the books,” he said. Coleman also believes that few people these days are able to identify sub-species of elms because of how rare they are. He says that somewhere between 25 to 75 million elms across the UK were lost in the 1970s on account of Dutch Elm Disease. 
  
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 Coleman attributes the survival of these two trees to a conservation effort invoked nearly 40 years ago. 
  
 “It is very likely the only reason these rare elms have survived is because Edinburgh City Council has been surveying and removing diseased elms since the 1980s,” he said. “Without that work many more of the thousands of elms in Edinburgh would have been lost. The success of this program may be partly demonstrated in the way two rare trees have been preserved.” 
  
 The queen’s botanists are now trying to figure out where these elms came from, but a preliminary investigation suggests they were introduced by the RBGE during the late 19th century. More importantly, they’re also looking into ways to preserve and propagate these last two remaining specimens. 
  
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 [RBGE, BBC] |||||
Student:
Botanists were sure that the Wentworth elm had gone extinct as part of a mass die-off of elm trees in the UK in the 1970s. Soaring 100 feet in the air in the garden of none other than Queen Elizabeth was proof to the contrary. Two botanists say they've identified two "weeping" trees standing in the Queen's garden at the Palace of Holyroodhouse in Scotland as Wentworth elms, thought to have been eradicated by Dutch elm disease some 20 years ago. The trees, apparently missed by scientists, are actually some of the most photographed trees at the palace, reports the BBC. However, Max Coleman of the Royal Botanic Garden Edinburgh explains Wentworth elms were so rare before they were thought to be extinct that few knew how to point them out. "Such a discovery when the trees in question are just shy of 100 feet and in plain sight does sound rather odd," Coleman says in a release, per Gizmodo. But "if you pull your tree book off the shelf to try and look them up, you won't find Wentworth elm listed in the books." The Queen's Wentworth elms might have come from the RBGE; records show it received three from Germany in 1902, but only one was mentioned in later records. It died in 1996. No matter their source, Coleman credits Edinburgh for keeping the trees alive. After millions of elms were killed, the city council began removing diseased elms to protect those remaining, Coleman says. "Without that work many more of the thousands of elms in Edinburgh would have been lost." (This is Europe's oldest tree.)