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 consistency, answers should be in all lower cased letters.

Category: LITERATURE 
Clue: George Du Maurier introduced this evil hypnotist in his 1894 novel "Trilby"
svengali

Category: FROGS 
Clue: Probably best known to TV viewers as Valene Ewing, she had female lead in 1972 “Frogs”
joan van ark

Category: TOYS & GAMES 
Clue: If you want to be a wizard on this machine, use a lot of body English & be careful not to tilt

pinball