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.

Let me give you an example: 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
The answer to this example can be: (F)
Here is why: This is a good example. Based on the passage, any cubs will return to China at the age of two

OK. solve this:
(CNN) The House and Senate reached a deal Saturday to slap Russia with fresh sanctions and give Congress new veto power to block any easing of those sanctions -- an agreement that could send a new bill to President Donald Trump's desk before the end of the month. House and Senate negotiators announced an agreement was reached Saturday morning for a bill that would include new sanctions against Russia, Iran, and North Korea. Despite the White House lobbying for changes to the measure, the legislation will give Congress a new ability to block the administration from easing sanctions on Moscow. Democrats and some Republicans have expressed concerns that Trump is considering giving Russia back two compounds in Maryland and New York that were seized by the Obama administration in December.The legislation will give Congress a new ability to block the administration from easing sanctions on MoscowThe House will vote on the bill on Tuesday 
 Questions:The bill faced a so-called blue slip constitutional problem that revenue generating legislation must originate in the _. (A) House (B) Senate (C) Russia (D) Congress (E) Donald Trump (F) Iran (G) North Korea (H) Moscow (I) Democrats (J) Republicans (K) Trump (L) Maryland (M) New York (N) Obama
Answer:
(A)