Question: What is the date of death of Nigar Sultana (Actress)'s husband?
Sentence (from "K. Asif"): K. Asif, born Asif Karim (14 June 1922 – 9 March 1971), was an Indian film director, film producer and screenwriter who is famous for his work on the Hindi/Urdu epic motion picture, "Mughal-e-Azam" (1960).
Relevant evidence: Yes