TASK DEFINITION: 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.
PROBLEM: Category: LAW 
Clue: In Latin legal lingo it means "by the fact itself"

SOLUTION: ipso facto

PROBLEM: Category: MASSACRE 
Clue: In 1991 this Ohio-based team trounced the Miami Heat 148-80 in the biggest NBA triumph ever

SOLUTION: the cleveland cavaliers

PROBLEM: Category: ANCIENT ROME 
Clue: This church faced periodic persecution for 300 years, until Constantine's conversion

SOLUTION:
christian church