Question: When were the subways built in the home city of the singer of Hitmixes?

full_context: Document 1: Madonna (entertainer): Madonna embarked on the Confessions Tour in May 2006, which had a global audience of 1.2 million and grossed over $193.7 million, becoming the highest-grossing tour to that date for a female artist. Madonna used religious symbols, such as the crucifix and Crown of Thorns, in the performance of "Live to Tell". It caused the Russian Orthodox Church and the Federation of Jewish Communities of Russia to urge all their members to boycott her concert. At the same time, the International Federation of the Phonographic Industry (IFPI) announced officially that Madonna had sold over 200 million copies for her albums alone worldwide.
Document 2: Hitmixes: Hitmixes is the second extended play (EP) by American singer Lady Gaga, released on August 25, 2009. Featuring remixes of songs from Gaga's debut album, The Fame (2008), the album was only released in Canada, by Universal Music Canada. Hitmixes features mixes from various musicians, including RedOne and Space Cowboy, who previously worked with Gaga. The EP hosts 1980s-influenced and house remixes. Hitmixes received positive reviews from the Calgary Herald and Blare Magazine, and peaked at number eight on the Canadian Albums Chart.
Document 3: Born This Way: The Collection: Born This Way: The Collection is the third compilation album by American singer Lady Gaga, released on November 18, 2011, by Interscope Records. The three-disc set includes her second studio album "Born This Way", the remix album "", and the DVD "". Photographer Nick Knight shot the cover of the release, which showed Gaga wearing a dress made of slime by designer Bart Hess. The box set was enclosed as a digipak with new booklets. The release received positive feedback from reviewers, but had minor commercial success, only entering charts in Greece, Italy, and South Korea.
Document 4: Ayu-mi-x: Ayu-mi-x (stylized as ayu-mi-x) is the first remix album by Japanese musician Ayumi Hamasaki. It was released on March 17, 1999 to promote A Song for ××. Ayu-mi-x remix album contains 2 discs. Disc 1 is the Remix Club Side which contains dance remixes. Disc 2 is the Acoustic Orchestra Side which contains orchestral remixes and 3 dub mixes.
Document 5: Lady Gaga: In 2009, Gaga spent a record 150 weeks on the UK Singles Chart and became the most downloaded female act in a year in the US, with 11.1 million downloads sold, earning an entry in the "Guinness Book of World Records". "The Fame" and "The Fame Monster" together have since sold more than 15 million copies worldwide. This success allowed Gaga to start her second worldwide concert tour, The Monster Ball Tour, and release "The Remix", her final record with Cherrytree Records and among the best-selling remix albums of all time. The Monster Ball Tour ran from November 2009 to May 2011 and grossed $227.4 million, making it the highest-grossing concert tour for a debut headlining artist. Concerts performed at Madison Square Garden in New York City were filmed for an HBO television special, "". Gaga also performed songs from her albums at the 2009 Royal Variety Performance, the 52nd Annual Grammy Awards, and the 2010 BRIT Awards. Before Michael Jackson's death, Gaga was set to take part in his canceled This Is It concert series at the O Arena in the UK.
Document 6: Get Ready for This: In 2013, American DJ/producer Steve Aoki released a remix of "Get Ready for This" on Byte Records as part of a forthcoming 2 Unlimited greatest hits album. The Rap and Orchestral mixes featured on the original "Get Ready for This" single were also included.
Document 7: The Remixes (Dannii Minogue album): The Remixes is a double-disc remixes compilation album by Australian pop–dance singer Dannii Minogue. It was released by Mushroom Records on 3 November 1998 in Australia. Since the compilation was a budget release, it was ineligible to chart on the Australian albums chart.
Document 8: Beyoncé: Beyoncé embarked on The Mrs. Carter Show World Tour on April 15 in Belgrade, Serbia; the tour included 132 dates that ran through to March 2014. It became the most successful tour of her career and one of the most-successful tours of all time. In May, Beyoncé's cover of Amy Winehouse's "Back to Black" with André 3000 on The Great Gatsby soundtrack was released. She was also honorary chair of the 2013 Met Gala. Beyoncé voiced Queen Tara in the 3D CGI animated film, Epic, released by 20th Century Fox on May 24, and recorded an original song for the film, "Rise Up", co-written with Sia.
Document 9: Madonna (entertainer): Having sold more than 300 million records worldwide, Madonna is recognized as the best-selling female recording artist of all time by Guinness World Records. The Recording Industry Association of America (RIAA) listed her as the best-selling female rock artist of the 20th century and the second best-selling female artist in the United States, with 64.5 million certified albums. According to Billboard, Madonna is the highest-grossing solo touring artist of all time, earning US $1.31 billion from her concerts since 1990. She was ranked at number two, behind only The Beatles, on the Billboard Hot 100 All-Time Top Artists, making her the most successful solo artist in the history of American singles chart. Madonna became one of the five founding members of the UK Music Hall of Fame and was inducted into the Rock and Roll Hall of Fame in her first year of eligibility.
Document 10: History of the New York City Subway: The first underground line opened on October 27, 1904, almost 35 years after the opening of the first elevated line in New York City, which became the IRT Ninth Avenue Line. By the time the first subway opened, the lines had been consolidated into two privately owned systems, the Brooklyn Rapid Transit Company (BRT, later Brooklyn -- Manhattan Transit Corporation, BMT) and the Interborough Rapid Transit Company (IRT). Many present lines were built under the Dual Contracts, and after 1913, all lines built for the IRT and most other lines built or improved for the BRT were built by the city and leased to the companies. The first line of the city - owned and operated Independent Subway System (IND) opened in 1932; this system was intended to compete with the private systems and allow some of the elevated railways to be torn down, but kept within the core of the City due to the low amount of startup capital provided to the municipal Board of Transportation, the later MTA, by the state. This required it to be run ``at cost '', necessitating fares up to double the five - cent fare popular at the time.
Document 11: Madonna (entertainer): Madonna also began work on her thirteenth studio album, with collaborators including Avicii, Diplo and Natalia Kills. In December 2014, thirteen demos recorded for the album leaked onto the Internet. She posted in response that half of the tracks would not be used on the final release, while the other half had "changed and evolved". The album, titled Rebel Heart, was released on March 10, 2015. From September 2015, she embarked on the Rebel Heart Tour to promote the album; the tour ended in March 2016 and traveled throughout North America, Europe and Asia and was the singer's first visit to Australia in 23 years, where she also performed a one-off show for her fans. It grossed a total of $169.8 million from the 82 shows, with over 1.045 million ticket sales. While on tour Madonna became embroiled in a legal battle with Ritchie, over the custody of her son Rocco. The dispute started when Rocco decided to continue living at England with Ritchie when the Rebel Heart Tour had visited there, while Madonna wanted him to return with her. Court hearings took place in both New York and London, and after multiple deliberations, Madonna decided to withdraw her application for custody, and appealed for a mutual discussion between herself and Ritchie about Rocco.
Document 12: New York City Subway: The Great Blizzard of 1888 helped demonstrate the benefits of an underground transportation system. A plan for the construction of the subway was approved in 1894, and construction began in 1900. The first underground line of the subway opened on October 27, 1904, almost 36 years after the opening of the first elevated line in New York City, which became the IRT Ninth Avenue Line. The fare was $0.05 and on the first day the trains carried over 150,000 passengers. The oldest structure still in use opened in 1885 as part of the BMT Lexington Avenue Line in Brooklyn and is now part of the BMT Jamaica Line. The oldest right - of - way, which is part of the BMT West End Line near Coney Island Creek, was in use in 1864 as a steam railroad called the Brooklyn, Bath and Coney Island Rail Road.
Document 13: New York City Subway: The New York City Subway is a rapid transit system owned by the City of New York and leased to the New York City Transit Authority, a subsidiary agency of the state - run Metropolitan Transportation Authority (MTA). Opened in 1904, the New York City Subway is one of the world's oldest public transit systems, one of the world's most used metro systems, and the metro system with the most stations. It offers service 24 hours per day on every day of the year, though some routes may operate only part - time.
Document 14: New York City: In 1898, the modern City of New York was formed with the consolidation of Brooklyn (until then a separate city), the County of New York (which then included parts of the Bronx), the County of Richmond, and the western portion of the County of Queens. The opening of the subway in 1904, first built as separate private systems, helped bind the new city together. Throughout the first half of the 20th century, the city became a world center for industry, commerce, and communication.
Document 15: New York City Subway: The New York City Subway is a rapid transit system owned by the City of New York and leased to the New York City Transit Authority, a subsidiary agency of the state - run Metropolitan Transportation Authority (MTA). Opened in 1904, the New York City Subway is one of the world's oldest public transit systems, one of the world's most used metro systems, and the metro system with the most stations. It offers service 24 hours per day on every day of the year.
ground_truth: October 27, 1904
sub_queries: who is the singer in Hitmixes? Answer: Lady Gaga
What is the home city of Lady Gaga ? Answer: New York City
when were the subways built in New York City Answer: October 27, 1904