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: (CNN) -- The midterm elections are a week away. Control of the Senate will be decided by a handful of close contests that remain competitive in the final days. In an era of narrow majorities in the upper chamber, just one or two races can make all the difference in terms of who will be in control. Most experts are predicting that Republicans will gain the Senate, though there are a few outliers, like my colleague at Princeton University, Sam Wang, whose statistical models have been showing that Democrats can still be victorious. In the coming days, here are six campaigns to watch. In each of these states Republicans are holding their ground by connecting their opponent to President Obama while Democrats strike back by reminding voters of extremism in the GOP.The outcome of six races could determine whether the U.S. remains in Democrats' handsJulian Zelizer: Democrats citing GOP extremism; Republicans cite Obama's performanceIn four of the states, Democratic incumbents are seeking to win re-electionZelizer: Can White House reverse historical pattern of midterm losses? 
 Question:North Carolina: This is a _ race that has been extremely expensive, with the national parties pouring money into advertising based on the view that this one can go either way, and it's close.
A:
Senate