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: MOVIE CO-STARS 
Clue: Meryl Streep & this actress were acclaimed for playing sisters in the 1996 film "Marvin's Room"
diane keaton

Category: HEAVY MACHINERY 
Clue: By definition it's a machine that gives a surface an even degree of slope
grader

Category: I AM CURIOUS "YELLOW" 
Clue: Drawn by R.F. Outcault, this hero of the first true newspaper comic strip debuted on May 5, 1895

the yellow kid