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 "Manmohan Singh (film director)"): Besides his Bollywood career as a cinematographer, he is also known as a pioneering director in Punjabi cinema.
Relevant evidence: No