Task: Explanation
Input (English): X-15 is a 1961 dramatic aviation film that presents a fictionalized account of the X-15 research rocket aircraft program, the test pilots who flew the aircraft, and the associated NASA community that supported the program. "X-15" starred David McLean, Charles Bronson, Mary Tyler Moore (in her first feature film role), Kenneth Tobey and James Gregory. The film marked the directorial debut of Richard Donner, and was narrated by James Stewart. Question: X-15 is a film that fictionalized the research rocket that set speed records in what decade? Answer: 1960s
Output (English): X15 is a 1961 dramatic aviation film that presents a fictionalized account of the X15 research rocket aircraft program, the test pilots who flew the aircraft, and the associated NASA community that supported the program.