Question: Manmohan Singh is film director of Punjabi films, and noted cinematographer of Bollywood films, he frequently collaborated with Yash Chopra, for whom he shot Dilwale Dulhania Le Jayenge, also known by the initialism DDLJ, is an Indian romance film written and directed by Aditya Chopra (In his directorial debut), in what year?
Sentence (from "Dil To Pagal Hai"): Dil To Pagal Hai (English: "The Heart Is Crazy"), also known as DTPH, is a 1997 Indian musical, romantic drama film directed by Yash Chopra.
Relevant evidence: No