Question: What is the date of death of the composer of film Mamta (1966 Film)?
Sentence (from "Mamta (1966 film)"): The film is also noted for its music by Roshan and lyrics by Majrooh Sultanpuri, in songs like, "Rahen Na Rahen Hum" sung by Lata Mangeshkar and her hit duet, "Chuppa Lo Yun Dil Mein Pyar Mera" with Hemant Kumar.
Relevant evidence: No