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) The Sudanese government has been accused of using chemical weapons against the people of Darfur, according to a report released by Amnesty International on Thursday. The attacks targeted civilians and may constitute a war crime, the report said. The Sudanese government has denied the allegations, calling them "rumors." Amnesty says it has new evidence abuses persist in a war that has been described as one of the world's worst humanitarian conflicts by the United Nations. Unidentified witnesses quoted in the Amnesty report said the attacks left a smoke, which turned dark blue and smelled "like rotten eggs," coating the trees, ground, and humans in a thick black dust.Chemical weapons deliberately against civilians in Darfur conflict, says AmnestyThe attacks may constitute a war crime, the report said.Witnesses say skin became rotten and fell off in chunks after attacks. 
 Question:The conflict in Darfur began around 2003 when several rebel groups in _ took up arms against the government in Khartoum.
A:
Darfur