Given the task definition and input, reply with output. 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.

Category: THE GREAT LAKES 
Clue: Now called Lake Michigan, the 17th century French called it the "Lake of" this Indian tribe

illini