Question: What is the date of birth of the director of film Sardar (1955 Film)?
Sentence (from "Gyan Mukherjee"): Gyan Mukherjee (30 September 1909 – 13 November 1956) was a Bengali Indian film director and screenwriter, who worked in Hindi cinema, best known for the hits "Jhoola" (1941) and "Kismet" (1943).
Relevant evidence: Yes