You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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. Among the entities, try to find the best entity that is most likely to fill in "_" and classify the answers based on options.

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. (A) Tian Tian (B) UK (C) Edinburgh Zoo (D) Sweetie (E) Yang Guang (F) China
Solution: (F)
Why? This is a good example. Based on the passage, any cubs will return to China at the age of two

New input: London (CNN) -- Significant progress was reportedly made last weekend in Geneva toward a landmark nuclear agreement with Iran. And, as talks concluded on November 10, U.S. Secretary of John Kerry announced that negotiations will start again on November 20. Despite the concerns of regional U.S. allies like Israel and Saudi Arabia, and also a significant number of legislators in the U.S. Congress, it is clear that the Obama administration is pushing strongly for deal as part of its wider Middle Eastern strategy. Indeed, Kerry has now spent more time negotiating with counterpart Iranian officials than any other U.S. high-level engagement for perhaps three decades.Obama administration seeking Iran deal as part of wider Mideast strategy, says Andrew HammonDeal would reportedly see Iran's nuclear capacity capped for six months, opened up to inspectionSince re-election, Obama has achieved little policy success amid political gridlock - HammondForeign policy allows Obama potential for long-term success, he adds 
 Questions:And, this shift is only likely to be reinforced if, as anticipated, the _ economic recovery continues to build up steam in 2014. (A) London (B) CNN (C) Geneva (D) Iran (E) U.S. (F) John Kerry (G) Israel (H) Saudi Arabia (I) U.S. Congress (J) Obama (K) Middle Eastern (L) Kerry (M) Iranian (N) Mideast (O) Andrew Hammon
Solution:
(E)