Question: Margot Kidder's and Jennifer Salt's co-star in "Sisters" appeared in how many movies, television shows and plays?
Sentence (from "Sisters (1973 film)"): Sisters (also known as "Blood Sisters" in the United Kingdom) is a 1973 American psychological horror film directed by Brian De Palma and starring Margot Kidder, Jennifer Salt and Charles Durning.
Relevant evidence: Yes