Question: The Philip Glass Ensemble is a musical group founded by composer Philip Glass in 1968, his first opera is which opera in four acts (framed and connected by five "knee plays" or intermezzos), composed by Philip Glass, and directed by theatrical producer Robert Wilson?
Sentence (from "Philip Glass Ensemble"): The Philip Glass Ensemble is a musical group founded by composer Philip Glass in 1968 to serve as a performance outlet for his experimental minimalist music.
Relevant evidence: No