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: The US has launched airstrikes against targets in Tikrit to support Iraqi ground forces trying to push ISIS militants out of the city, a senior official said. Iraq requested the strikes, which began Wednesday and are 'ongoing,' according to the unnamed US official. An Associated Press correspondent in Tikrit reported hearing warplanes overhead late Wednesday, followed by multiple explosions. Scroll down for video Stalled ground offensive: Smoke rose over Tikrit, where Iraqi security forces and Shiite militias have battled ISIS militants Iraq began the Tikrit ground offensive in early March without requesting US air support, even as it welcomed help from Iran.Iraq requested the airstrikes to support an offensive begun in early MarchAt the outset of the offensive, the Iraqi forces declined US-led coalition support though it looked to Iran for weapons and artilleryA Pentagon spokesman said the offensive has 'stalled' 
 Question:That bombing targeted _ combat units and destroyed what the US called an ISIS 'fighting position,' as well as an ISIS armored vehicle.
A:
ISIS