In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].

Example input: For four years we have waited expectantly for the pitter patter of tiny paws. Soon, that wait could finally be over. Tian Tian, the UK's only female giant panda, has conceived and could give birth to a cub as early as August. However Edinburgh Zoo, where the pandas live, have warned people 'not to get too excited' as the process is 'extremely complex'. Moreover, on the two previous occasions keepers inseminated Tian Tian - whose name means 'Sweetie' - she has failed to produce a panda cub. She was artificially inseminated again in March this year, but keepers at the zoo say implantation - when a fertilised egg attaches to the uterus - has not yet occurred.Tian Tian has conceived and could give birth to a cub as early as AugustShe has been inseminated twice before but so far failed to produce a cubTian Tian and Yang Guang arrived in 2011 from China to great fanfareOn loan at £600k a year, became first giant pandas to live in UK for 17 years 
 Questions:Under the terms of the agreement any cubs will return to _ at the age of two, the age at which they would normally leave their mother in the wild.
Example output: China
Example explanation: This is a good example. Based on the passage, any cubs will return to China at the age of two
Q: (CNN) Since the headline-grabbing murder of American journalist James Foley by ISIS militants in August 2014, the world has been regularly confronted with a modern form of an ancient, horrifying method of execution. British and American aid workers, Japanese and American journalists, Kurdish and Syrian soldiers, Egyptian and Ethiopian Christians and an alleged Russian spy were among those who followed in Foley's wake: their gruesome beheadings documented on camera and disseminated as propaganda to a global online audience. Canadian John Ridsdel, held by the Philippines-based, ISIS-allied jihadist group Abu Sayyaf since he was abducted in September, is the latest victim to be murdered in this way.The wave of jihadist beheadings in recent years has horrified people all over the worldIt may have contributed to beheading incidents by non-jihadists, says academicAcademic says exposure to the videos could help "prime" some people to emulate them 
 Question:The highly ritualized killings have galvanized international opposition to _, but may also have helped attract a wave of foreign recruits to the group's cause.
A:
ISIS