Question: American Atheists is a non-profit activist organization in the United States, the organization was founded by Madalyn Murray O'Hair, in which year?

Context paragraphs:
Madalyn Murray O'Hair: Madalyn Murray O'Hair ("née" Mays; April 13, 1919 – September 29, 1995), who also used multiple pseudonyms (her most preferred being M. Bible), was an American activist, founder of American Atheists, and the organization's president from 1963 to 1986.  She created the first issues of "American Atheist Magazine".  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.

William J. Murray: William J. "Bill" Murray III (born May 25, 1946) is an American author, Baptist minister, and social conservative lobbyist who currently serves as the chairman of the Religious Freedom Coalition, a non-profit organization in Washington, D.C., active on issues related to aiding Christians in Islamic and Communist countries.  The son of the late atheist Madalyn Murray O'Hair, Murray played a significant part alongside his mother in the ending of mandatory prayer in public schools in 1963.

Jon Garth Murray: Jon Garth Murray (November 16, 1954 – September 29, 1995) was the second son of late controversial activist Madalyn Murray O'Hair, the first president and founder of American Atheists, Inc., in 1963.  He was also the half-brother of the reverend William "Bill" Murray.

North American Man/Boy Love Association: The North American Man/Boy Love Association (NAMBLA) is a pedophile and pederasty advocacy organization in the United States.  It works to abolish age-of-consent laws criminalizing adult sexual involvement with minors and campaigns for the release of men who have been jailed for sexual contacts with minors that did not involve coercion.  The group no longer holds regular national meetings, and as of the late 1990s—to avoid local police infiltration—the organization discouraged the formation of local chapters.  Around 1995, an undercover detective discovered there were 1,100 people on the organization's rolls.  In 1997, NAMBLA was the largest group in IPCE, an international pro-pedophile activist organization.  Since then, the organization has dwindled to only a handful of people, with many members joining online pedophile networks such as DanPedo, BoyChat, and Annabelleigh, according to Xavier Von Erck, director of operations at the anti-pedophile organization Perverted-Justice.  As of 2005, a newspaper report stated that NAMBLA was based in New York and San Francisco.

American Atheists: American Atheists is a non-profit activist organization in the United States dedicated to defending the civil liberties of atheists and advocating for the complete separation of church and state.  It provides speakers for colleges, universities, clubs and the news media.  It also publishes books and the quarterly "American Atheist Magazine", currently edited by Pamela Whissel.  The organization was founded by Madalyn Murray O'Hair in 1963, following her role in removing mandatory prayer from public schools.

House Rabbit Society: The House Rabbit Society (HRS) is a non-profit activist organization based in Richmond, California, United States (US), that rescues and adopts rabbits and educates the community with its curriculum on rabbit care.  HRS promotes responsible rabbit ownership, including the spaying and neutering of all pet rabbits, proper veterinary care, diet, and exercise.  HRS takes the stand that domestic rabbits should not live outdoors. ] .

David Silverman (activist): David "Dave" Silverman (born August 13, 1966) is the current president of the American Atheists, a non-profit organization that supports the rights of atheists and the removal of expressions of religion in public when possibly interpretable as governmental endorsement, in accordance with the First Amendment of the United States Constitution.  His annual anti-Christmas billboard which calls Christmas "a myth" has often sparked controversy.

Ellen Johnson: Ellen Johnson (born 1955) is an American activist for the civil rights of atheists and for the separation of church and state in the United States.  She served as the president of the organization American Atheists from 1995–2008.

Students for Saving Social Security: Students for Saving Social Security, known as S4, was a 501(c)(3) non-profit activist organization based in Washington, D.C., run by students for students pushing for Social Security reform.  S4 was founded in March 2005 and proposed changing Social Security laws to permit personal savings accounts.  The organization had a network of 300+ college chapters with more than 11,000 members by 2008.

Edwin Kagin: Edwin Frederick Kagin (November 26, 1940 – March 28, 2014) was an attorney at law in Union, Kentucky, and a founder of Camp Quest, the first secular summer camp in the United States for the children of secularists, atheists, agnostics, brights, skeptics, naturalists and freethinkers.  He served as the National Legal Director of American Atheists from 2006 until his death in 2014.

Supporting paragraphs: American Atheists Madalyn Murray O'Hair
Answer: 1963