input question: Determine the topic of the question-answer pair. Question: "how long did the roman empire last?";  Answer: "The 500-year-old Roman Republic , which preceded it, had been destabilized through a series of civil wars ."? Topic:???
output answer: Roman Empire

input question: Determine the topic of the question-answer pair. Question: "where is testosterone produced?";  Answer: "Testosterone is a steroid hormone from the androgen group and is found in mammals, reptiles, birds, and other vertebrates ."? Topic:???
output answer: Testosterone

input question: Determine the topic of the question-answer pair. Question: "what is mpeg4  avc or sp/asp?";  Answer: "H.264/MPEG-4 Part 10 or AVC (Advanced Video Coding) is a standard for video compression , and is currently one of the most commonly used formats for the recording, compression, and distribution of high definition video ."? Topic:???
output answer: H.264/MPEG-4 AVC

input question: Determine the topic of the question-answer pair. Question: "what is an irregular heartbeat pvc?";  Answer: "A premature ventricular contraction (PVC), also known as a premature ventricular complex, ventricular premature contraction (or complex or complexes) (VPC), ventricular premature beat (VPB), or ventricular extrasystole (VES), is a relatively common event where the heartbeat is initiated by Purkinje fibres in the ventricles rather than by the sinoatrial node , the normal heartbeat initiator."? Topic:???
output answer:
Premature ventricular contraction