Birthright generation is a term used by immigrant advocates to identify U.S. born citizens; citizens are protected by the Fourteenth Amendment of the United States Constitution, which grants American citizenship to all babies born on American soil whether the child is born to one or both undocumented parents.
 Birthright citizenship may be also conferred either by "jus soli" or "jus sanguinis".
 Under the United States Law, any person born within the U.S. including the territories of: Puerto Rico, Guam, the US Virgin Islands, and the Northern Mariana Islands, and subject to its jurisdiction is automatically granted US citizenship.
Citizenship Counts is a non-partisan 501(c)(3) organization based in Arizona that is dedicated to inspiring American youth with a civic education curriculum that teaches them the value and responsibilities of citizenship, promotes pride in American citizenship, and encourages students to be involved in their communities.
Vivienne Haigh-Wood Eliot (28 May 1888 – 22 January 1947) was an English governess and writer, who became known for her marriage in 1915 to the American poet T. S. Eliot.
 Her legacy, and the extent to which she influenced Eliot's work, has been the subject of much debate.
 She has been seen variously as a "femme fatale" who enticed the patrician Eliot into a disastrous marriage, or as his muse, without whom some of his most important work would never have been written.
 Valerie Eliot, the poet's second wife (from 1957) claimed the copyright of Haigh-Wood's writings in 1984, including her private diaries, which has complicated the research into her role in Eliot's life.
This is a list of notable Indian Americans, including both original immigrants who obtained American citizenship and their American descendants.
 Note that unlike many countries, India does not allow dual citizenship.
Gerda Weissmann Klein (born Gerda Weissmann, May 8, 1924, Bielsko, Poland) is a Polish-born American writer and human rights activist.
 Her autobiographical account of the Holocaust, "All but My Life" (1957), was adapted for the 1995 short film, "One Survivor Remembers", which received an Academy Award and an Emmy Award, and was selected for the National Film Registry.
 She married Kurt Klein (1920–2002) in 1946.
 The Kleins became advocates of Holocaust education and human rights, dedicating most of their lives to promoting tolerance and community service.
 A naturalized U.S. citizen, Gerda Weissmann Klein also founded Citizenship Counts, a nonprofit organization that champions the value and responsibilities of American citizenship.
 She has served on the governing board of the United States Holocaust Memorial Museum, which features her testimony in a permanent exhibit.
 On February 15, 2011, Klein was presented with the Presidential Medal of Freedom, the highest civilian award in the United States.
 In 2013, she published a children's adventure story called "The Windsor Caper", which had remained hidden away since the 1980s, when it was a weekly serial in "The Buffalo News".
"The Hollow Men" (1925) is a poem by T. S. Eliot.
 Its themes are, like many of Eliot's poems, overlapping and fragmentary, but it is recognized to be concerned most with post-World War I Europe under the Treaty of Versailles (which Eliot despised: compare "Gerontion"), the difficulty of hope and religious conversion, and, as some critics argue, Eliot's own failed marriage (Vivienne Haigh-Wood Eliot might have been having an affair with Bertrand Russell).
 The poem is divided into five parts and consists of 98 lines of which the last four are "probably the most quoted lines of any 20th-century poet writing in English".
Thomas Stearns Eliot, {'1': ", '2': ", '3': ", '4': "} (26 September 1888 – 4 January 1965) was a British essayist, publisher, playwright, literary and social critic, and "one of the twentieth century's major poets".
 He moved from his native United States to England in 1914 at the age of 25, settling, working, and marrying there.
 He eventually became a British subject in 1927 at the age of 39, renouncing his American citizenship.
Tom & Viv is a play written by English playwright Michael Hastings.
 The play is based on the real life of T. S. Eliot and his wife Vivienne Haigh-Wood Eliot.
Heinrich Karl Ernst Martin Meyer (17 May 1904, Nuremberg, Germany; 10 October 1977, Bellingham, Washington) was a German professor and author.
 He first moved to the United States to work at Rice University in 1930 and officially naturalized on 6 November 1935.
 In 1942 a petition was submitted to revoke his citizenship due to his national German sympathies, and the case was fought in courts until ultimately he was allowed to retain his American citizenship in 1944.
 In the next thirty-plus years Meyer wrote extensively about German literature and about American Culture, but also published on gardening under pseudonym John Anderson, Robert O. Barlow, Hugo Cartesius und H. K. Houston Meyer.
 His papers are held in the Jean and Alexander Heard Library Special Collections at Vanderbilt University.
The Renunciation Act of 1944 (Public Law 78-405, 58 Stat.
 677 ) was an act of the 78th Congress regarding the renunciation of United States citizenship.
 Prior to the law's passage, it was not possible to lose U.S. citizenship while in U.S. territory except by conviction for treason; the Renunciation Act allowed people physically present in the U.S. to renounce citizenship when the country was in a state of war by making an application to the Attorney General.
 The intention of the 1944 Act was to encourage Japanese American internees to renounce citizenship so that they could be deported to Japan.

Question: at what age did Vivienne Haigh-Wood Eliot's husband renounce his American citizenship?
Answer: 39