Question: Both The Turn of the Screw and Martha are categorized as what genre?
Sentence (from "The Turn of the Screw (opera)"): The Turn of the Screw is a 20th-century English chamber opera composed by Benjamin Britten with a libretto by Myfanwy Piper, "wife of the artist John Piper, who had been a friend of the composer since 1935 and had provided designs for several of the operas".
Relevant evidence: Yes