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?

full_context: Document 1: 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.
Document 2: 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.
Document 3: Annie Laurie Gaylor: Annie Laurie Gaylor (born November 2, 1955) is a co-founder of – and, with her husband Dan Barker, a current co-president of – the Freedom From Religion Foundation. She was also the editor of the organization's newspaper, "Freethought Today" (published ten times per year) until 2015. Gaylor is the author of several books, including "Woe to the Women: The Bible Tells Me So", "Betrayal of Trust: Clergy Abuse of Children" and, as editor, "Women Without Superstition: No GodsNo Masters". She graduated from the University of Wisconsin–Madison's School of Journalism in 1980.
Document 4: 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.
Document 5: Dan Barker: Daniel Edwin Barker (born June 25, 1949) is an American atheist activist who served as a Christian preacher and musician for 19 years but left Christianity in 1984. He and his wife Annie Laurie Gaylor are the current co-presidents of the Freedom From Religion Foundation. He has written numerous articles for "Freethought Today", an American freethought newspaper. He is the author of several books including "Losing Faith in Faith: From Preacher to Atheist".
Document 6: Town of Greece v. Galloway: Town of Greece v. Galloway, 572 U.S. ___ (2014) , is a United States Supreme Court case in which the court decided that the Town of Greece, New York may permit volunteer chaplains to open each legislative session with a prayer. The plaintiffs were Susan Galloway and Linda Stephens, represented by Americans United for Separation of Church and State. They argue that the prayers violate the Establishment Clause of the First Amendment to the United States Constitution. The United States Court of Appeals for the Second Circuit ruled against the town, and on May 20, 2013 the Supreme Court agreed to rule on the issue. On May 5, 2014, the U.S. Supreme Court ruled 5-4 in favor of the Town of Greece, and that the town's practice of beginning legislative sessions with prayers does not violate the Establishment Clause of the First Amendment.
Document 7: 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.
Document 8: 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.
Document 9: Ayaan Hirsi Ali: Ayaan Hirsi Ali (] , born Ayaan Hirsi Magan, on 13 November 1969) is a Somali-born Dutch-American activist, feminist, author, scholar, and former Dutch politician. She received international attention as a critic of Islam and advocate for the rights and self-determination of Muslim women, actively opposing forced marriage, honor violence, child marriage and female genital mutilation. She has founded an organisation for the defense of women's rights, the AHA Foundation.
Document 10: 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.
Document 11: Frederick Clarkson: Frederick Clarkson is an American journalist and public speaker in the fields of politics and religion. He is the author of "Eternal Hostility: The Struggle Between Theocracy and Democracy" (1997, ISBN  ); editor of "Dispatches from the Religious Left: The Future of Faith and Politics in America" (2008, ISBN  ); and co-author of "Challenging the Christian Right: The Activist’s Handbook" (1992) for which he and his co-author were named among the "Media Heroes of 1992" by the Institute for Alternative Journalism. They were described as "especially brave at taking on powerful institutions and persistent about getting stories out...journalists and activists who persevere in fighting censorship and protecting the First Amendment," and "understanding the Christian Right's recent strategy of stealth politics early on, and or doggedly tracking its activities across the U.S." He has also published articles with Salon.com, "Ms. magazine", "The Christian Science Monitor", and other publications. As of 2008, he served on the advisory board of the Campaign to Defend the Constitution, an organization dedicated to opposing the religious right; and on the editorial boards of "The Public Eye" and "In These Times" magazines.
Document 12: Campaign to Defend the Constitution: Campaign to Defend the Constitution (DefCon) was an American online organization founded in September 2005 to support the separation of church and state and to oppose what it perceived as the growing influence of the religious right. It was a project of the Tides Center, a non-profit organization that funds progressive groups. However, its funding ran out in December 2007, at which time its blog announced the organization was "taking a break."
Document 13: Liberty Counsel: Liberty Counsel is a 501(c)(3) tax-exempt organization that promotes litigation related to evangelical Christian values. Liberty Counsel was founded in 1989 by its chairman Mathew D. Staver and its president Anita L. Staver, who are attorneys and married to each other. The Southern Poverty Law Center has listed Liberty Counsel as an Anti-LGBT hate group, a designation which has been disputed by the group.
Document 14: Out Campaign: The Out Campaign is a public awareness initiative for freethought and atheism. It was initiated by Robin Elisabeth Cornwell, and is endorsed by Richard Dawkins, a prominent atheist. The campaign aims to create more openness about being an atheist by providing a means by which atheists can identify themselves to others by displaying the movement's scarlet letter "A", a scarlet colored capital "A" in the Zapfino typeface, and an allusion to the scarlet letter "A" worn by Hester Prynne after being convicted of adultery in Nathaniel Hawthorne's "The Scarlet Letter". It encourages those who wish to be part of the campaign to come out and re-appropriate, in a humorous way, the social stigma that in some places persists against atheism, by branding themselves with a scarlet letter.
Document 15: Megan Phelps-Roper: Megan Phelps-Roper (born January 31, 1986) is a social media activist, lobbying to overcome divisions and hatred between religious and political divides. Formerly a prominent member of the Westboro Baptist Church (WBC), she left the church with her sister Grace in November 2012. Her mother is Shirley Phelps-Roper, whose father was the church's founder Fred Phelps.
ground_truth: 1963