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.
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Question: Category: CANTANTES 
Clue: Last name of Enrique who's following in his father Julio's footsteps...er vocal cords

Answer: iglesias


Question: Category: NAMES YOU SHOULD KNOW 
Clue: Sharing her first name with Robin Hood's sweetie, this African-Amer. contralto earned the 1963 Pres. Medal of Freedom

Answer: marian anderson


Question: Category: BODIES OF WATER 
Clue: Rising in the Valdai Hills of Russia, this is Europe's longest river

Answer:
the volga