Problem: Given the question: Determine the topic of the question. Question: "when was the first super bowl?" Topic:
++++++++++++++++++++++++++++++++
The answer is:
Super Bowl

Problem: Given the question: Determine the topic of the question. Question: "what percent of illegal immigrants are from mexico and europe?" Topic:
++++++++++++++++++++++++++++++++
The answer is:
Illegal immigration to the United States

Problem: Given the question: Determine the topic of the question. Question: "how long was richard nixon a president?" Topic:
++++++++++++++++++++++++++++++++
The answer is:
Richard Nixon