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].
One example is below.
Q: 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: China
Rationale: This is a good example. Based on the passage, any cubs will return to China at the age of two
Q: Calexico, California (CNN) For the first time on the border, drug traffickers allegedly bought U.S. property for the sole purpose of building a house to conceal the end of a 415-yard smuggling tunnel from Mexico, authorities said Wednesday. Inside the life of a drug-trafficking teen Four people were arrested this week in connection with a raid on the tunnel underneath a three-bedroom house in Calexico, California, that sits about 300 yards north of the international line, authorities said. The tunnel entrance was inside a restaurant in Mexicali, Mexico, according to U.S. Immigration and Customs Enforcement. Authorities confiscated 1,532 pounds of marijuana, with a street value of nearly $6 million.Smugglers allegedly bought U.S. property for the sole purpose of hiding a drug tunnel, feds saySmugglers allegedly built a house with a hole in living room that led to tunnelThe drug tunnel ran 415 yards between Calexico, California and a restaurant in Mexicali, Mexico 
 Question:_ also used a second Calexico residence four miles from the tunnel exit to store the drugs and then they moved the narcotics to a Calexico warehouse, where transportation cells moved the drugs to the cities northward, authorities said.
A:
Smugglers