Question: When was the world trade center built in the home city of the singer in Hitmixes?

full_context: Document 1: 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 2: World Trade Center (1973–2001): One World Trade Center and Two World Trade Center, commonly the Twin Towers, were designed by architect Minoru Yamasaki as framed tube structures, which provided tenants with open floor plans, uninterrupted by columns or walls. They were the main buildings of the World Trade Center. Construction of the North Tower at One World Trade Center began in 1966 with the South Tower at Two World Trade Center. When completed in 1972, 1 World Trade Center became the tallest building in the world for two years, surpassing the Empire State Building after its 40-year reign. The North Tower stood 1,368 feet (417 m) tall and featured a 362 foot (110 m) telecommunications antenna or mast that was built on the roof in 1978. With this addition, the highest point of the North Tower reached 1,730 feet (530 m). Chicago's Sears Tower, finished in May 1973, reached 1,450 feet (440 m) at the rooftop.
Document 3: 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 4: World Trade Center (1973–2001): The original World Trade Center was a large complex of seven buildings in Lower Manhattan, New York City, United States. It featured the landmark twin towers, which opened on April 4, 1973, and were destroyed as a result of the September 11 attacks in 2001. At the time of their completion, the ``Twin Towers ''-- the original 1 World Trade Center, at 1,368 feet (417 m); and 2 World Trade Center, at 1,362 feet (415.1 m) -- were the tallest buildings in the world. The other buildings in the complex included the Marriott World Trade Center (3 WTC), 4 WTC, 5 WTC, 6 WTC, and 7 WTC. All these buildings were built between 1975 and 1985, with a construction cost of $400 million ($2,300,000,000 in 2014 dollars). The complex was located in New York City's Financial District and contained 13,400,000 square feet (1,240,000 m) of office space.
Document 5: 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 6: 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 7: 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 8: World Trade Center (1973–2001): The original World Trade Center was a large complex of seven buildings in Lower Manhattan, New York City, United States. It featured the landmark Twin Towers, which opened on April 4, 1973 and were destroyed in 2001 during the September 11 attacks. At the time of their completion, the Twin Towers -- the original 1 World Trade Center, at 1,368 feet (417 m); and 2 World Trade Center, at 1,362 feet (415.1 m) -- were the tallest buildings in the world. Other buildings in the complex included the Marriott World Trade Center (3 WTC), 4 WTC, 5 WTC, 6 WTC, and 7 WTC. The complex was located in New York City's Financial District and contained 13,400,000 square feet (1,240,000 m) of office space.
Document 9: 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 10: 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 11: 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 12: 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 13: World Trade Center (1973–2001): The cleanup and recovery process at the World Trade Center site took eight months, during which the remains of the other buildings were demolished. The World Trade Center complex was rebuilt over more than a decade. The site is being rebuilt with six new skyscrapers, while a memorial to those killed in the attacks and a new rapid transit hub have both opened. One World Trade Center, the tallest building in the United States, is the lead building for the new complex, reaching more than 100 stories upon completion in November 2014.
Document 14: 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 15: World Trade Center (1973–2001): The original World Trade Center was a large complex of seven buildings in Lower Manhattan, New York City, United States. It featured the landmark twin towers, which opened on April 4, 1973, and were destroyed in 2001 during the September 11 attacks. At the time of their completion, the ``Twin Towers ''-- the original 1 World Trade Center, at 1,368 feet (417 m); and 2 World Trade Center, at 1,362 feet (415.1 m) -- were the tallest buildings in the world. Other buildings in the complex included the Marriott World Trade Center (3 WTC), 4 WTC, 5 WTC, 6 WTC, and 7 WTC. All were built between 1975 and 1985, with a cost of $400 million ($2,300,000,000 in 2014 dollars). The complex was located in New York City's Financial District and contained 13,400,000 square feet (1,240,000 m) of office space.
ground_truth: 1973
sub_queries: who is the singer in Hitmixes? Answer: Lady Gaga
What is the home city of Lady Gaga ? Answer: New York City
when was the world trade center built in New York City Answer: 1973