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.

[Q]: Category: PICTURE BOOK TITLE ANIMALS 
Clue: "If You Give a ____ a Cookie"
[A]: mouse


[Q]: Category: CINEMA 
Clue: Vangelis' theme from this 1981 British film took a record 21 weeks on the charts to reach No. 1
[A]: "chariots of fire"


[Q]: Category: CAT SKILLS 
Clue: Cats have a "nictitating membrane", a third one of these, which is used to clear dust from the cornea
[A]:
an eyelid