Problem: Determine the topic of the question. Question: "what is middle class in the us?" Topic:

A: American middle class


Problem: Determine the topic of the question. Question: "What is firebird server?" Topic:

A: Firebird (database server)


Problem: Determine the topic of the question. Question: "who discovered the 2 moons of mars,Phobos and Deimos?" Topic:

A: Moons of Mars


Problem: Determine the topic of the question. Question: "what does a cutter do?" Topic:

A:
Cutter (baseball)