Question: What kind of vocalist is the performer of the song "Walking in the Air", of the 1982 animated film "The Snowman"?
Sentence (from "The Secret of NIMH 2: Timmy to the Rescue"): In the film, Timothy Brisby, the youngest son of Jonathan and Mrs. Brisby, goes to Thorn Valley wanting to become a hero like his father.
Relevant evidence: No