Teacher:You are given a concept, and a list of answers. You should generate a question about the concept that leads to the given answer(s).
Teacher: Now, understand the problem? Solve this instance: concept: Trey Parker answers: ['Eric Cartman', 'Fosse McDonald', 'Kenny McCormick', 'Chef', 'Butters Stotch', 'Mr. Garrison', 'Kyle Broflovski', 'Stan Marsh']
Student:
what characters does trey parker voice?