Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
One example: Who was the first American President?
Solution is here: president of the united states
Explanation: The question talks about the president of the USA.

Now, solve this: The Pepsi Center is home to a professional basketball and hockey teams, as well as the National Lacrosse League team, the Mammoths, and also hosted the 2008 Democratic National Convention. In what major US city is it located?
Solution:
pepsi center