input question: Determine the topic of the passage. "Heart rate can vary as the body's need to absorb oxygen and excrete carbon dioxide changes, such as during physical exercise , sleep , illness, or as a result of ingesting drugs :" Topic:???
output answer: Heart rate

Determine the topic of the passage. "With roots in blues rock and psychedelic rock , the bands that created heavy metal developed a thick, massive sound, characterized by highly amplified distortion , extended guitar solos, emphatic beats, and overall loudness." Topic:
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Answer: Heavy metal music

Q: Determine the topic of the passage. "The tropics is a region of the Earth surrounding the Equator ." Topic:
A: Tropics

Question: Determine the topic of the passage. "He won his MMA debut on October 6, 2012, defeating Vince Lucero via TKO in the first round." Topic:
Answer: Dave Batista

[Q]: Determine the topic of the passage. ".eu is the country code top-level domain (ccTLD) for the European Union (EU)." Topic:
****
[A]: .eu

Problem: Given the question: Determine the topic of the passage. "The American Federation of Government Employees (AFGE) is an American labor union representing over 650,000 employees of the federal government , about 5,000 employees of the District of Columbia , and a few hundred private sector employees, mostly in and around federal facilities." Topic:
++++++++++++++++++++++++++++++++
The answer is:

American Federation of Government Employees