instruction:
In this task, you're given a context, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both context and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the context or linked information.
question:
Context: The United States of America will compete at the 2015 World Championships in Athletics from August 22 to August 30 in Beijing, China. Link Information: China (), officially the People's Republic of China (PRC), is a country in East Asia and the world's most populous country, with a population of around /1e9 round 3 billion in 2017. Covering approximately 9600000 km2, i Answer: 9600000 km2
answer:
What is the size of the country that hosted the 2015 World Championships in Athletics?


question:
Context: During high school, he attended a summer program at the Juilliard School Link Information: The Juilliard School () is a private performing arts conservatory in New York City. Established in 1905 Answer: 1905
answer:
When was the school where Guttenberg attended a summer program during high school established?


question:
Context: starts off with a French accordion and then experiments with dance-oriented beats with subtle urban influences, using synthesizers. Link Information: The accordion's basic form is believed to have been invented in Berlin, in 1822,  Answer: 1822
answer:

Of the instruments used in Intuition, what year was the oldest invented?