Question: When was the American mathematician died who was portrayed in the biographical drama "A Beautiful Mind" (2001)?
Sentence (from "John Forbes Nash Jr."): John Forbes Nash Jr. (June 13, 1928 – May 23, 2015) was an American mathematician who made fundamental contributions to game theory, differential geometry, and the study of partial differential equations. Nash's work has provided insight into the factors that govern chance and decision-making inside complex systems found in everyday life.
Relevant evidence: Yes