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?
{'answer': '38', 'supporting_facts': [['Betty Ann Davies', 0], ['Betty Ann Davies', 4], ['Betty Ann Davies', 5], ['Betty Ann Davies', 6], ['Blithe Spirit (play)', 0]]}