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: TOYMAKERS 
Clue: In 1997 Mattel sued Miller'$, a magazine devoted to this fashion doll, for copyright infringement
barbie

Category: THE NEW YORK TIMES OP-ED PAGE 
Clue: His 2005 farewell column said, "Never retire!"; he kept his Sunday magazine language column
william safire

Category: SUN 
Clue: It's defined as the sun & the planets, moons, & whatever the heck else revolves around it

the solar system