Question: Avriel Benjamin "Avi" Kaplan won what show as part of the group Pentatonix?
Sentence (from "Pentatonix"): Pentatonix (abbreviated PTX) is a five-member American a cappella group from Arlington, Texas, consisting of vocalists Scott Hoying, Mitch Grassi, Kirstin Maldonado, Avi Kaplan, and Kevin Olusola.
Relevant evidence: No