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: Washington (CNN) Sen. Marco Rubio, a longtime hawk on Syria, praised the US airstrike on a Syrian airfield days after a chemical attack on innocents attributed to Syrian President Bashar al-Assad. Following news that President Donald Trump had green-lit the US action, Rubio said Thursday on CNN's "Anderson Cooper 360" that Russia could not fairly criticize the military strike because Russia backed Assad -- who is accused of perpetrating the attack on his own people. "They have no standing to say anything about this," Rubio said of the Russians. He said that the move doesn't just send a message, but amounts to a "significant degrading" of Assad's ability to carry out chemical attacks.Rubio said Russians had put themselves into harm's wayHe said the strikes indicated a firm US stance against Assad's reign 
 Questions:"I'll let them speak for their policy, but tonight's actions show that the days of being able to act with impunity are over when it comes to Bashar al-_," Rubio said. (A) Washington (B) CNN (C) Marco Rubio (D) Syria (E) US (F) Syrian (G) Bashar al (H) Assad (I) Donald Trump (J) Rubio (K) Anderson Cooper 360 (L) Russia (M) Russians
Solution:
(H)