Question: How many films did the actress that is starred in the comic play by Noel Coward and is bet known for her outstanding stage triumph in the role of Blanche du Bois, appear in?
Sentence (from "Betty Ann Davies"): Betty Ann Davies (24 December 1910 – 14 May 1955) was a British stage and film actress active from the 1920s to the 1950s.
Relevant evidence: Yes