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) Iraqi forces have taken another step toward wresting Mosul from ISIS. Security forces launched a large-scale military operation Saturday to take the remaining neighborhoods under ISIS control in western Mosul, the country's Joint Operation Command said. Soldiers are storming the Shifa neighborhood and al Jamhouri Hospital. Iraqi counterterrorism forces are advancing on the al Saha al Awla neighborhood, the command said. Advancing toward the Old City Police, counterterrorism and army units started storming the al-Zanjili district and headed toward the Old City, said federal police head, Lt. Gen. Ra'ed Shaker Jawdat. The Old City is also still controlled by ISIS, and authorities hope to close in on that neighborhood with their new offensive, police said. The area will pose a challenge because of its narrow streets and ISIS' use of residents as human shields.Iraq kicks off effort to take remaining Mosul neighborhoodsResidents are fleeing western Mosul amid the fighting 
 Question:He also expressed deep concern for the safety of civilians behind ISIS lines in western _.
A:
Mosul