Question: Which of the following is known for his role in the drama "Mystic River": Larry Hagman or Sean Penn?
Sentence (from "Larry Hagman"): Larry Martin Hagman (September 21, 1931 November 23, 2012) was an American film and television actor, director and producer best known for playing ruthless oil baron J.R. Ewing in the 1980s primetime television soap opera "Dallas" and befuddled astronaut Major Anthony "Tony" Nelson in the 1960s sitcom, "I Dream of Jeannie".
Relevant evidence: Yes