Question: Which country the director of film Kaala Patthar is from?
Sentence (from "Kaala Patthar"): The film was based on the Chasnala mining disaster, and is the fourth collaboration between Amitabh Bachchan, Shashi Kapoor and director Yash Chopra, which succeeded the films "Deewaar" (1975), "Kabhie Kabhie" (1976) and "Trishul" (1978).
Relevant evidence: No