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: "E" FOR EFFORT 
Clue: To dig up, specifically the deceased

A: to exhume
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Q: Category: CRUSADER 
Clue: Pope Urban II said anyone going to liberate this city for devotion alone, not booty, can do it instead of any penance

A: jerusalem
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Q: Category: TOUGH BODIES OF WATER 
Clue: Ethiopia's Lake Tana serves as the main source of this "colorful" river

A:
the blue nile
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