Question: Gustav Mahler composed a beautiful piece performed by the Bach-Elgar Choir. What is the name of that piece??
Sentence (from "Bach-Elgar Choir"): The choir has had several distinguished directors throughout its history and has performed in several notable venues including Roy Thomson Hall in Toronto, the Brantford's Sanderson Centre, with the Buffalo Philharmonic Orchestra, and at the Boris Brott Summer Festival.
Relevant evidence: No