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: SHAKESPEARE 
Clue: Saturninus opens this play saying, "Noble patricians, patrons of my right, defend the justice of my cause with arms"

A: titus andronicus
****
Q: Category: U.S. RIVERS 
Clue: The Falls of Saint Anthony stop this mighty river from being navigable north of St. Paul, Minnesota

A: the mississippi
****
Q: Category: FAIRY TALES 
Clue: During his adventures, this tiny "digital" favorite is swallowed by a cow, a giant & a fish

A:
tom thumb
****