You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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. Among the entities, try to find the best entity that is most likely to fill in "_" and classify the answers based on options.

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) Tian Tian (B) UK (C) Edinburgh Zoo (D) Sweetie (E) Yang Guang (F) China
Solution: (F)
Why? This is a good example. Based on the passage, any cubs will return to China at the age of two

New input: (CNN) Actor Ben Stiller revealed on Tuesday he was diagnosed with prostate cancer in 2014. The tumor was surgically removed three months later, in September 2014, and Stiller has been cancer-free since. Stiller shared the news on Howard Stern's Sirius XM radio show, and in an essay posted online. According to Stiller, it was the prostate-specific antigen test, a blood test known as the PSA, that saved his life. He was tested and treated in his 40s. But the American Cancer Society recommends testing start at age 50 for men such as Stiller, who are at average risk of prostate cancer. Men at high risk, including African-American men and those with a father, son or brother diagnosed with prostate cancer at an early age should be screened at age 45, the American Cancer Society recommends.Ben Stiller was diagnosed with prostate cancer in 2014 in his 40sAmerican Cancer Society advises prostate cancer screenings start at age 50Prostate cancer is the second-most common cancer in men in the United States, after skin cancer 
 Questions:When the results came back, the news was blunt: "So yeah, it's cancer," the urologist told _. (A) Ben Stiller (B) Howard Stern (C) Sirius XM (D) PSA (E) American Cancer Society (F) African (G) American (H) United States
Solution:
(A)