Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.

Q: the timber rattlesnake ("crotalus horridus") is a species of venomous pit vipers.

A: timber rattlesnake
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Q: theoxena scissaria is a species of moth.

A: theoxena scissaria
****
Q: elizabeth carolan (born november 24, 1980) better known by her ring name beth phoenix, is an american professional wrestler.

A:
beth phoenix
****