Question: Martina María Iñíguez de Monreal is an Argentine known for writing about the History of the tango, and wrote a biography of who?
Context: By the Light of a Star (Spanish:En la luz de una estrella) is a 1941 Argentine musical drama film directed by Enrique Santos Discépolo and starring Hugo del Carril, Ana María Lynch and María Esther Gamas.  It is a tango film, an extremely popular genre during the Golden Age of Argentine Cinema. Tango, a distinctive dance and the corresponding musical style of tango music, began in the working-class port neighborhoods of Montevideo (Uruguay) and (Buenos Aires), Argentina; on both sides of the Rio de la Plata. Martina María Iñíguez de Monreal is an Argentine known for writing about the History of the tango.  She wrote a biography of Carlos Gardel. Maria del Carmen Rodriguez de Rivarola, better known by her artistic name Maria Rivarola (born in Buenos Aires, ca. 1957) is an outstanding professional dancer, social dancer, and choreographer of the Argentine Tango.  She is known for performing a specific style of Argentine Tango known as Milonguero Tango.  She is also known worldwide for being a cast member of the show "Tango Argentino", released in 1983, which resulted in her nomination, along with the rest of the dancers, for the Tony Award in 1986 for Best Choreography.  Since her youth, Carlos Rivarola has been her dance partner.  Together, they present themselves artistically as Maria and Carlos Rivarola.  Maria was one of the founders of the Association of Teachers, Dancers, and Choreographers of the Argentine Tango (ATDCAT) in 2001. Ovidio Cátulo González Castillo (6 August 1906 – 19 October 1975) was an Argentine poet and tango music composer.  He was the author of many famous works, such as ', "El aguacero" (lyrics by ), ' and "Caserón de tejas" (both with music by ), "María" and "" (both with music by Aníbal Troilo), and "El último café" (with music by ).  The tango "La calesita", which he composed with Mariano Mores, inspired the film of the same name directed in 1962 by Hugo del Carril. Octeto Buenos Aires was a tango octet formed in 1955 by the Argentine bandoneon player Astor Piazzolla.  The ensemble pioneered nuevo tango, a new approach to tango which, until then, had been dominated by the traditional orquesta típicas of the 1930s and 1940s.  This would mark a watershed in the history of tango and set Piazzolla on a collision course with the tango establishment. La Higa de Monreal is a mountain in Monreal, Navarre to the southeast of Pamplona.  It marks the southern tip of the Alaiz mountain range, which form part of the Pyrenees. The World tango dance tournament (in Spanish: "Campeonato Mundial de Baile de Tango", also known as "Mundial de Tango") is an annual competition of Argentine Tango, held in Buenos Aires, Argentina, usually in August, as part of the Buenos Aires Tango Festival organized by the city's government.  In 2014 the events were between 13-26/August. Maggie Ferguson (born in Sydney) is an Australian violinist and bandoneonista who studied orchestral tango at Orquesta Escuela de Tango Emilio Balcarce in Buenos Aires from 2003.  In 2009, with the Sydney Youth Orchestras Association (SYO), she created Tango Oz, Australia's first national tango orchestra which she directs from the bandoneon.  TangoOz were the focus of Sydney's first Tango Escuela held by the SYO in collaboration with the Conservatorium High School in July 2009 under the guest direction of Ignacio Varchausky and Santiago Polimeni.  A second collaboration with Canberra Youth Music occurred in 2010 for Resonate Festival, including William Barton, Ignacio Varchausky and Santiago Polimeni.  This showcased the traditional Argentine tango instrument, bandoneon performed with improvised didgeridoo. Con alma de tango is a 1994-5 Argentine television series featuring tango dancing.  The series aired on Canal 9, premiering on 24 October 1994.  It stars María Bufano, Ricardo Dupont, Osvaldo Guidi, and Estela Molly.  Veteran actress Amelia Bence also had a role in the series.
Answer: Carlos Gardel