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: MOVIE MOUNTAINS 
Clue: This peak is featured in the 1959 Disney film "Third Man on the Mountain", where it's called "The Citadel"
answer:
the matterhorn


question:
Category: SCIENTIFIC MNEMONICS 
Clue: "Kings play chess on finely grained sand" is a mnemonic device used to help remember a system devised by this scientist
answer:
carolus linnaeus


question:
Category: POTPOURRI...NO FOOLIN' 
Clue: In 1956 Johnson Wax introduced Raid & this brand that got a Potpourri Country Garden version in 1989
answer:

glade