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

Which European country has the Cupon as its currency?
moldovan cupon

Which river begins in the Rocky Mountains in south-west Colorado, crosses New Mexico and forms the border between Mexico and the USA before reaching the Gulf of Mexico?
new mexico

Who played the title role in the 2004 movie Catwoman?

catwoman