Question: Who is in charge of where the headquarters of EGREM is located?

full_context: Document 1: Havana: The current mayor of Havana ("President of the People's Power Provincial Assembly") is Marta Hernández Romero, she was elected on March 5, 2011.
Document 2: Marie Atkins: Marie Atkins was mayor of the Kingston and Saint Andrew Corporation (KSAC) from 1989 to 2003. Atkins was the third female mayor for Kingston & St. Andrew, Jamaica, and is the longest-serving mayor to date for Kingston & St. Andrew. She is the first Jamaican to become the president of the World Conference of Mayors.
Document 3: Mexico City: The first elected head of government was Cuauhtémoc Cárdenas. Cárdenas resigned in 1999 to run in the 2000 presidential elections and designated Rosario Robles to succeed him, who became the first woman (elected or otherwise) to govern Mexico City. In 2000 Andrés Manuel López Obrador was elected, and resigned in 2005 to run in the 2006 presidential elections, Alejandro Encinas being designated by the Legislative Assembly to finish the term. In 2006, Marcelo Ebrard was elected for the 2006–2012 period.
Document 4: Sony Music: Columbia founded Epic Records in 1953. In 1956, Conkling left Columbia, he would help establish the National Academy of Recording Arts and Sciences before eventually becoming the first president of the newly launched Warner Bros. Records, and Goddard Lieberson began the first of two stints as head of the record company. In 1958, Columbia founded another label, Date Records, which initially issued rockabilly music.
Document 5: Cinepoly Records: Cinepoly Records (新藝寶) is a Hong Kong-based record label founded in 1985. It was a subsidiary of PolyGram Records and the film company Cinema City. Ownership of Cinepoly Records switched to Universal Music Group after Universal acquired PolyGram Records in 1998 and albums are now distributed by Universal Music Hong Kong.
Document 6: Areito (record label): Areito is a Cuban record label founded in 1964 as the primary imprint of EGREM, which is based in Havana. Areito is named after the recording studio from which the vast majority of its catalog stems, which in turn was named after the Taíno ritual of the same name. Prior to the nationalization of the Cuban music industry in 1961, the studio was property of the Panart record label. Since the 1960s, Areito/EGREM has been the main music company in Cuba, managing most of the recording, manufacture and distribution of albums, EPs and singles in the country. Areito's counterpart in eastern Cuba is Siboney.
Document 7: Sony Music: In 1966, CBS reorganized its corporate structure with Leiberson promoted to head the new "CBS-Columbia Group" which made the now renamed CBS Records company a separate unit of this new group run by Clive Davis.
Document 8: Houston: The city of Houston has a strong mayoral form of municipal government. Houston is a home rule city and all municipal elections in the state of Texas are nonpartisan. The City's elected officials are the mayor, city controller and 16 members of the Houston City Council. The current mayor of Houston is Sylvester Turner, a Democrat elected on a nonpartisan ballot. Houston's mayor serves as the city's chief administrator, executive officer, and official representative, and is responsible for the general management of the city and for seeing that all laws and ordinances are enforced.
Document 9: Miami: In recent years the city government, under Mayor Manny Diaz, has taken an ambitious stance in support of bicycling in Miami for both recreation and commuting. Every month, the city hosts "Bike Miami", where major streets in Downtown and Brickell are closed to automobiles, but left open for pedestrians and bicyclists. The event began in November 2008, and has doubled in popularity from 1,500 participants to about 3,000 in the October 2009 Bike Miami. This is the longest-running such event in the US. In October 2009, the city also approved an extensive 20-year plan for bike routes and paths around the city. The city has begun construction of bike routes as of late 2009, and ordinances requiring bike parking in all future construction in the city became mandatory as of October 2009.
Document 10: Sony Music: Sony Music Entertainment Inc. (sometimes known as Sony Music or by the initials, SME) is an American music corporation managed and operated by Sony Corporation of America (SCA), a subsidiary of Japanese conglomerate Sony Corporation. In 1929, the enterprise was first founded as American Record Corporation (ARC) and, in 1938, was renamed Columbia Recording Corporation, following ARC's acquisition by CBS. In 1966, the company was reorganized to become CBS Records. In 1987, Sony Corporation of Japan bought the company, and in 1991, renamed it SME. It is the world's second largest recorded music company, after Universal Music Group.
Document 11: Carmen Cardinali Paoa: Chilean deputy Interior Minister Rodrigo Ubilla appointed Carmen Cardinali as Governor of Easter Island in early September 2010 to replace Edmunds. Cardinali's challenges included archeological preservation of the island's heritage and revamping the tourist industry. She served as a Governor until March 2014, being replaced by Marta Raquel Hotus Tuki, appointed by president Michelle Bachelet.
Document 12: Buena Vista Social Club: Buena Vista Social Club Genres Son, bolero, guajira, danzón Years active 1996 -- present Labels World Circuit Nonesuch Elektra Records Members Jesús ``Aguaje ''Ramos Eliades Ochoa Omara Portuondo Barbarito Torres Papi Oviedo Manuel`` Guajiro'' Mirabal Guajirito Mirabal Luis Alemany Rolando Luna Pedro Pablo Filiberto Sánchez Alberto La Noche Andrés Coayo Idania Valdés Carlos Calunga Past members Compay Segundo Rubén González Ibrahim Ferrer Pío Leyva Angá Díaz Orlando ``Cachaíto ''López Manuel Galbán Manuel`` Puntillita'' Licea Juan de Marcos González Ry Cooder Joachim Cooder Amadito Valdés Alberto ``Virgilio ''Valdés Lázaro Villa Julienne Oviedo Sánchez Luis Barzaga Carlos González
Document 13: Discovery Records: Marx had first become artistic for later Musicraft Records in 1944 before starting his own label. In the 1970s Musicraft Records was revived through Discovery/Trend by Albert Marx in Los Angeles. He also started the Trend AM-PM label in the 1980s to document and promote talented educational, college level jazz ensembles to include the Los Angeles Jazz Workshop, Nashville Jazz Machine and the Fullerton College Jazz Ensemble. His estate sold the Discovery, Trend and Musicraft jazz labels in 1991 to Jac Holzman, which he refashioned into a contemporary label. In 1993, Discovery Records was acquired by Warner Music Group and was absorbed by Sire Records in 1996.
Document 14: Dynamic (record label): Dynamic is an Italian independent record label located in Genoa. Founded in 1978, it specialises in classical music and opera, especially rarely performed works and has produced several world premiere recordings. The Dynamic catalogue contains over 400 titles, with about 25 new titles added each year and is distributed in 32 countries.
Document 15: Cerro, Havana: Cerro is one of the 15 municipalities or boroughs ("municipios" in Spanish) in the city of Havana, Cuba. As of 2016 it is considered "one of Havana’s poorest municipalities."
ground_truth: Marta Hernández Romero
sub_queries: EGREM >> headquarters location Answer: Havana
Who was in charge of Havana ? Answer: Marta Hernández Romero