Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

Chelsea won the 2009 FA Cup final 2-1.  Who were the beaten finalists?
2009 fa cup final

What did Edwin Land invent because of his daughters' wish for instant and 'snappy' results?
edwin h. land

The group 'Abba' was formed in which European capital city in 1971?

abba