Question: On what date was the Taylor Swift studio album which had "Back to December" on it released?

full_context: Document 1: Mine (Taylor Swift song): "Mine" is a song written and performed by American singer-songwriter Taylor Swift. Produced by Swift along with Nathan Chapman, it was released as the lead single from Swift's third studio album, "Speak Now" (2010) by Big Machine Records. Following an unauthorized internet leak, the song was released on August 4, 2010, two weeks earlier than the intended release date. Swift was inspired to write "Mine" after reflecting on one of her unnamed crushes and explained that the song is about her tendency to run from love. The song contains elements of power-pop and its lyrics speak of the ups and downs of a young love.
Document 2: Begin Again (Taylor Swift song): "Begin Again" is a song written and recorded by American singer-songwriter Taylor Swift for her fourth studio album, "Red" (2012). Swift co-produced the song with Nathan Chapman and Dann Huff. Initially released as a promotional single on September 25, 2012 by Big Machine Records, the song served as the second single from "Red" on October 1, 2012. "Begin Again" is a country song, with the lyrical content finds Swift falling in love again after a failed relationship.
Document 3: Sparks Fly (song): "Sparks Fly" is a song written and recorded by American singer-songwriter Taylor Swift for her third studio album "Speak Now" (2010). Swift wrote the song when she was 16 years old, prior to the release of her debut single "Tim McGraw" in 2006. Following a 2007 live performance of the song, "Sparks Fly" grew in popularity among Swift's fanbase. While "Speak Now" was under production, she received requests from fans to include the song on the album. Produced by Swift and Nathan Chapman, the song was serviced to country radio in the United States by Big Machine Records on July 18, 2011, as the fifth single from "Speak Now". A CD single was released on Swift's official store for a limited time on August 10, 2011.
Document 4: Taylor Swift (album): Taylor Swift is the debut studio album by American singer-songwriter Taylor Swift, released on October 24, 2006, by Big Machine Records. Swift was 16 years old at the time of the album's release and wrote its songs during her freshman year of high school. Swift has writing credits on all of the album's songs, including those co-written with Liz Rose. Swift experimented with several producers, ultimately choosing Nathan Chapman, who had produced her demo album. Musically, the album is country music styled, and lyrically it speaks of romantic relationships, a couple of which Swift wrote from observing relationships before being in one. Lyrics also touch on Swift's personal struggles in high school.
Document 5: We Are Never Ever Getting Back Together: "We Are Never Ever Getting Back Together" is a song recorded by American singer-songwriter Taylor Swift for her fourth studio album, "Red" (2012). Swift co-wrote the song with its producers, Max Martin and Shellback. The song was released as the lead single from "Red" on August 13, 2012, by Big Machine Records. Its lyrics depict Swift's frustrations at an ex-lover who wants to re-kindle their relationship. "Rolling Stone" magazine named the song the second best song of 2012 while it took the fourth spot in "Time"' s end-of-year poll. It has received a Grammy Award nomination for Record of the Year. It also received a People's Choice Awards nomination for Favorite Song of the Year.
Document 6: Should've Said No: "Should've Said No" is a song written and recorded by American singer-songwriter Taylor Swift. The song serves as the fifth and final single from her self-titled debut studio album. The song is about Swift addressing her former lover who cheated on her. It became her second number-one single on the "Billboard" Hot Country Songs chart, and was a Top 40 hit on the "Billboard" Hot 100. In addition, "Should've Said No" has been certified platinum by the Recording Industry Association of America (RIAA).
Document 7: Back to December: "Back to December" is a song written and recorded by American singer/songwriter Taylor Swift for her third studio album "Speak Now" (2010). The song was sent to country radio in the United States on November 15, 2010, as the second single from "Speak Now". According to Swift, "Back to December" is the first time she ever apologizes to someone in a song. Critics speculate that the song is about Taylor Lautner, Swift's ex-boyfriend, which was later acknowledged by Lautner. "Back to December" is considered an orchestral country pop ballad and its lyrics are a remorseful plea for forgiveness for breaking up with a former lover.
Document 8: The Story of Us (song): "The Story of Us" is a song written and recorded by American singer-songwriter Taylor Swift for her third studio album, "Speak Now" (2010). Produced by Swift alongside Nathan Chapman, the song was sent to mainstream radio in the United States on April 19, 2011, as the fourth single from "Speak Now". Swift composed "The Story of Us" regarding the time when she encountered an ex-boyfriend of hers at the 2010 CMT Music Awards. At the event, the two attempted to ignore each other, which inspired Swift to compose the song.
Document 9: Speak Now: Speak Now is the third studio album by American singer-songwriter Taylor Swift. It was released on October 25, 2010, by Big Machine Records. Production for the album took place during 2009 to 2010 at several recording studios, and was handled by Swift and Nathan Chapman. Written entirely by Swift as the follow-up to "Fearless", "Speak Now" expands on the country pop style of her previous work, and features lyrical themes including love, romance and heartbreak.
Document 10: Fearless (Taylor Swift song): "Fearless" is a country pop song performed by American singer-songwriter Taylor Swift. The song was co-written by Swift in collaboration with Liz Rose and Hillary Lindsey and produced by Nathan Chapman and Swift. "Fearless" was released on January 3, 2010 by Big Machine Records as the fifth and final single from Swift's second studio album of the same name (2008). Swift composed the song while traveling on tour to promote her eponymous debut album, "Taylor Swift" (2006). She wrote "Fearless" in regard to the fearlessness of falling in love and eventually titled her second studio album after the song. Musically, it contains qualities commonly found in country pop music and, lyrically, is about a perfect first date.
Document 11: Mean (song): "Mean" is a song written and recorded by American singer-songwriter Taylor Swift for her third studio album, "Speak Now" (2010). Produced by Swift alongside Nathan Chapman, the song was sent to country radio in the United States on March 13, 2011, as the third single from "Speak Now". "Mean" garnered mixed reviews from critics for its lyrical detail and profound country sound. The song received commercial success in the United States and Canada, debuting at number 11 on the "Billboard" Hot 100 and number ten on the Canadian Hot 100. The song also appeared on the Australian Singles Chart at number 45.
Document 12: Sorry (Justin Bieber song): "Sorry" is a song recorded by Canadian singer Justin Bieber for his fourth studio album, "Purpose" (2015). Written by Julia Michaels, Justin Tranter, Sonny Moore, Michael Tucker and Bieber; the song was produced by Skrillex and Blood. It was released on October 23, 2015, as the second single from the album. A dancehall-pop and tropical house song, "Sorry" contains in its instrumentation "brassy horn bleats", warm island rhythms and a dembow riddim beat. Lyrically, "Sorry" is a plea for a chance to apologize to a lover, with Bieber asking forgiveness and a second chance to redeem himself.
Document 13: You're Not Sorry: "You're Not Sorry" is a country rock song performed by American singer-songwriter Taylor Swift. The song was solely written by Swift and produced by Nathan Chapman with Swift's aid. It was released on October 28, 2008 by Big Machine Records as a promotional single from Swift's second studio album, "Fearless" on iTunes, though it is no longer available. A remix version for the television episode of "" in which Swift made an appearance was later released. Swift wrote "You're Not Sorry", inspired by an ex-boyfriend who was revealed to be opposite of what he appeared to be. The song is a power ballad with country and rock music influences.
Document 14: Red (Taylor Swift album): Red is the fourth studio album by American singer-songwriter Taylor Swift. It was released on October 22, 2012, by Big Machine Records, as the follow-up to her third studio album, "Speak Now". The album title was inspired by the "semi-toxic relationships" that Swift experienced during the process of conceiving this album, which Swift described the emotions she felt as "red emotions" due to their intense and tumultuous nature. "Red" touches on Swift's signature themes of love and heartbreak, however, from a more mature perspective while exploring other themes such as fame and the pressure of being in the limelight. The album features collaborations with producers and guest artists such as Gary Lightbody of Snow Patrol and Ed Sheeran and is noted for Swift's experimentation with new musical genres. Swift completed The Red Tour in support of the album on June 12, 2014, which became the highest-grossing tour of all time by a country artist, grossing over $150 million.
Document 15: Long Live (Taylor Swift song): "Long Live" is a song written and recorded by American singer-songwriter Taylor Swift for her third studio album "Speak Now" (2010). The original version of the song was written by Swift, and produced by Nathan Chapman with Swift's assistance, and served as the closing track on "Speak Now". On the strength of digital downloads following the album's release, the song charted at No. 85 on the U.S. "Billboard" Hot 100.
ground_truth: October 25, 2010