Question: What is the birthdate of this American white supremacist, who calls himself an identitarian and who has had involvement with Lucian Wintrich?

Context paragraphs:
Richard B. Spencer: Richard Bertrand Spencer (born May 11, 1978) is an American white supremacist.  He is president of the National Policy Institute, a white supremacist think tank, as well as Washington Summit Publishers.  Spencer has stated that he rejects the label of white supremacist, and prefers to describe himself as an identitarian.  He has advocated for a white homeland for a "dispossessed white race" and called for "peaceful ethnic cleansing" to halt the "deconstruction" of European culture.

Jamie Kelso: Jamie Kelso (June 8, 1948) is an American white supremacist and former Church of Scientology member of the elite Sea Org.  He hosts daily web radio programs, including "The Jamie Kelso Show" on the Voice of Reason Broadcast Network, and is a senior moderator of the white supremacist Stormfront website, where he uses the name Charles A. Lindberg.  Kelso became a moderator at Stormfront in 2002 and was instrumental in its rapid growth, partially by encouraging senior figures in the white supremacist movement to post.

Paul Fromm (white supremacist): Frederick Paul Fromm (born January 3, 1949), known as Paul Fromm, is a Canadian white supremacist and perennial candidate based in Mississauga, Ontario.  Fromm is the international director of the white supremacist organization Council of Conservative Citizens.  He has hosted a radio show on the Stormfront web site and has ties to former Ku Klux Klan members David Duke, Don Black, and Mark Martin (a white supremacist rally organizer in Covington, Ohio).  The "National Post" newspaper described him as "one of Canada's most notorious white supremacists."

Carrie C. White: Carrie C. White ("née" Joyner; August 1888 – February 14, 1991) was an American woman whom "Guinness World Records" recognized as the oldest person in the world in 1988, the year she allegedly turned 114.  This claim was based on documents from the Florida State Hospital, where she was institutionalized from 1909 to 1984, that listed her birthdate as November 18, 1874.  White officially held the "Guinness" title as oldest person until her death in 1991, supposedly at the age of 116.  However, the hospital's records were later disputed and eventually revealed to be an error, with White's true birthdate apparently being in August 1888.

Lucian Wintrich: Lucian Wintrich (born May 24, 1988) is an American political artist and political commentator and the White House correspondent for the Gateway Pundit.  He has frequently been described in media reports as associated with the alt-right, though now with the involvement of Richard B. Spencer in the aforementioned movement Wintrich has disavowed the label.

Identity Evropa: Identity Evropa is a white supremacist group in the United States, established in March 2016.  Part of the broader white supremacist alt-right movement, the group is identified as a racist white supremacist organization by the Anti-Defamation League and is designated by the Southern Poverty Law Center as a hate group.  Relatively small in size, the group is seen as one of several groups contributing to a rising spike of white nationalism in the U.S. since 2015.  The group particularly targets college campuses, by distributing white nationalist slogans on fliers, posters, and stickers.

Jared Taylor: Samuel Jared Taylor (born September 15, 1951) is an American white nationalist and white supremacist.  He is the founder and editor of "American Renaissance", a white supremacist magazine.  Taylor is also an author and the president of "American Renaissance"' s parent organization, New Century Foundation, through which many of his books have been published.  He is a former member of the advisory board of "The Occidental Quarterly", and a former director of the National Policy Institute, a Virginia-based white nationalist think tank.  He is also a board member and spokesperson of the Council of Conservative Citizens.

Aryan Brotherhood of Texas: The Aryan Brotherhood of Texas (ABT) is an American white supremacist prison gang.  According to the Anti-Defamation League and the Southern Poverty Law Center, the Aryan Brotherhood of Texas is one of the largest and most violent white supremacist prison gangs in the United States, responsible for numerous murders and other violent crimes.

Identitarian movement: The Identitarian movement is a movement that advocates the preservation of national identity and a return to 'traditional western values'.  It has been described as white nationalist and white supremacist.  It started in France in 2002 as a conservative youth movement deriving from the French "Nouvelle Droite" (New Right) "Génération Identitaire".  Initially the youth wing of the anti-immigration, conservative Bloc Identitaire, it has taken on its own identity and is largely classified as a separate entity altogether with the intent of spreading across Europe.

Traditionalist Youth Network: The Traditionalist Youth Network (TYN) is a far-right white nationalist group based in the United States.  Established in 2013 by Matthew Heimbach, the group promotes white separatism and a white supremacist view of Christianity.  Modeled after the European Identitarian movement, the TYN has held a number of protests and other local events.  In 2015, the group established an offshoot political party, the Traditionalist Worker Party, to run in elections for local office.

Supporting paragraphs: Lucian Wintrich Richard B. Spencer
Answer: May 11, 1978