Question: In what year did the mission, piloted by the seventh man in space, occur?
Sentence (from "X-15 Flight 91"): X-15 Flight 91 was a 1963 American manned mission, and the second and final flight in the program to achieve sub-orbital spaceflight—a flight over 100 km in altitude—which was previously achieved during Flight 90 a month earlier.
Relevant evidence: Yes