instruction:
Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.
question:
What boy band is Harry Styles a member of?
answer:
one direction

question:
Who became President of Germany in June 2010?
answer:
christian wulff

question:
Which actor returned to ER in 2009 to huge acclaim?
answer:
george clooney