instruction:
You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
question:
Category: BRAND NAMES 
Clue: This brand of petroleum jelly was selling a jar a minute in the U.S. by the 1880s, & it's still a favorite
answer:
vaseline


question:
Category: MR. BODY 
Clue: Fed by the hepatic portal veins, it weighs about a pound more in men than in women
answer:
liver


question:
Category: ENDANGERED SPECIES 
Clue: It's no laughing matter:  farmers in Africa have killed thousands of the brown species of this scavenger
answer:

the hyena