Question: Jon Garth Murray, was the second son of late controversial activist Madalyn Murray O'Hair, was an American activist, founder of American Atheists, and the organization's president, from which span of years?
Sentence (from "Madalyn Murray O'Hair"): One of her sons, Jon Garth Murray, became the nominal president of the organization from 1986 to 1995, but she remained "de facto" president during these nine years.
Relevant evidence: No