Detailed Instructions: In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it. Your job is to determine which sentence(s) from the passage can be used to search for further information needed to answer the question.
Problem:Question: How many other characters has the voice actor for Don in "Piranha Germs" played? Passage:Season ten also features many guest appearances. John DiMaggio (credited as "Johnny Dee") provided the voice of Master Shake's muscles in "Muscles". Phillip Tallman provided the voice of the condo salesman in "The Dudies". In "Merlo Sauvignon Blanco" Henry Zebrowski provided the voice of Merlo and Lavell Crawford voiced Unbelievable Ron. In "Banana Planet" the Chimp Aliens were voiced by Matt Besser (credited as "Matt Bessar"), Lavell Crawford, Curtis Gwinn (credited as "Curjay Gwinn"). Jim Florentine voiced the unseen manager in "Working Stiffs", which also features Dana Swanson and Wendy Cross. "Skins" features Josh Warren, Thomas Decoud, Mary Kraft, T.M. Levin, and Rob Kutner. Casey Wilson (credited as "Rose Higdon") voiced Freda, the titular character in "Freda". In "Storage Zeebles" Bobcat Goldthwait voiced Zingo, Mary Mack voiced Zaffy, Bobby Moynihan voiced Zarfonius, Paul Painter voiced the Wise and All-Knowing Bush, and Paul Rust voiced Zorf. Don was voiced by Brian Stack in "Piranha Germs", which also features Rob Poynter.

Solution:
Don was voiced by Brian Stack in "Piranha Germs", which also features Rob Poynter