Question: Freddie Mercury was the leader of what band?/

full_context: Document 1: The Freddie Mercury Tribute Concert: The Freddie Mercury Tribute Concert for AIDS Awareness was a benefit concert held on Easter Monday, 20 April 1992 at Wembley Stadium in London, England for an audience of 72,000. The concert was produced for television by Ray Burdis and broadcast live on television and radio to 76 countries around the world, with an audience of up to one billion. The concert was a tribute to the life of Queen lead vocalist, Freddie Mercury, with proceeds going to AIDS research. The show marked bassist John Deacon's final full-length concert with Queen (save a short live appearance with Brian May, Roger Taylor and Elton John in 1997). The profits from the concert were used to launch The Mercury Phoenix Trust, an AIDS charity organisation.
Document 2: Crazy Little Thing Called Love: "Crazy Little Thing Called Love" is a song by the British rock band Queen. Written by Freddie Mercury in 1979, the track is featured on their 1980 album "The Game", and also appears on the band's compilation album, "Greatest Hits" in 1981. The song peaked at number two in the UK Singles Chart in 1979, and became the group's first number-one single on the "Billboard" Hot 100 in the US in 1980, remaining there for four consecutive weeks. It topped the Australian ARIA Charts for seven weeks.
Document 3: The Invisible Man (Queen song): "The Invisible Man" is a song by the British rock band Queen, written by drummer Roger Taylor but credited to Queen. The song is sung mostly by Freddie Mercury, with vocal contributions from Taylor. Originally released on the album "The Miracle", it was released as a single in 1989. Taylor claims that he got the inspiration to create the song while reading a book (possibly the book of the same name), and the bassline instantly came to his imagination. This song marks the only time in any of Queen's songs that all four band members names are mentioned in the lyrics. The first being Freddie Mercury, followed by John Deacon. Brian May's name is then said twice (just before his guitar solo starts), and while saying "Roger Taylor", the first "r" is rolled to emulate the drums at the end of the verse. Freddie Mercury's name is said by drummer Roger Taylor, and the other ones by the lead singer Freddie Mercury.
Document 4: Lover of Life, Singer of Songs: Lover of Life, Singer of Songs (with the subtitle "The Very Best of Freddie Mercury Solo") is a compilation album of Freddie Mercury's solo songs. It was released (except in the U.S.) on 4 September 2006, the day before Mercury's 60th Birthday. It was released on 21 November 2006 in the U.S, three days before the 15th anniversary of Mercury's death.
Document 5: The Works (Queen album): The Works is the eleventh studio album by the British rock band Queen, released on 27 February 1984 by EMI Records in the United Kingdom and by Capitol Records in the United States. After the synth-heavy "Hot Space" (1982), the album saw the re-emergence of Brian May and Roger Taylor's rock sound, while still incorporating the early 80s retro futuristic electro pop of the German electronic underground (Freddie Mercury) and New York funk scenes (John Deacon). Recorded at the Record Plant Studios in Los Angeles, California and Musicland Studios in Munich, Germany from August 1983 to January 1984, the album's title comes from a comment Taylor made as recording began – "Let's give them the works!" During the decade, after a conservative reaction against and ban of the music video for "I Want to Break Free" in the United States, the band decided not to tour in North America and lost the top spot in U.S. sales, but sales around the world (especially Europe) would be even better. "The Works" has sold over 5 million copies worldwide.
Document 6: Freddie Mercury: Farrokh "Freddie" Mercury (born Bulsara; 5 September 1946 – 24 November 1991) was a British singer, songwriter and record producer, known as the lead vocalist of the rock band Queen. He was known for his flamboyant stage persona and four-octave vocal range. Mercury wrote numerous hits for Queen, including "Bohemian Rhapsody", "Killer Queen", "Somebody to Love", "Don't Stop Me Now", "Crazy Little Thing Called Love", and "We Are the Champions". He led a solo career while performing with Queen, and occasionally served as a producer and guest musician for other artists.
Document 7: Queen (Queen album): Queen is the eponymous debut studio album by the British rock band Queen, released on 13 July 1973 by EMI Records in the UK and by Elektra Records in the US. It was recorded at Trident Studios and De Lane Lea Music Centre, London, with production by Roy Thomas Baker (as Roy Baker), John Anthony and Queen. The album was influenced by the hard rock, progressive rock and heavy metal of the time and covers subjects such as folklore ("My Fairy King") and religion ("Jesus"). Lead singer Freddie Mercury composed five of the ten tracks, guitarist Brian May composed four songs, (including "Doing All Right", which was co-written by then Smile band-mate Tim Staffell), and drummer Roger Taylor composed and sang "Modern Times Rock and Roll". The final song on the album is a short instrumental version of "Seven Seas of Rhye".
Document 8: Magic Tour (Queen): The Magic Tour was the biggest and final tour by the British rock band Queen with their lead singer Freddie Mercury and their bass guitarist John Deacon, which took place in 1986. The band would not tour again until 19 years later, when the Queen + Paul Rodgers Tour began in 2005, after the death of Freddie Mercury on 24 November 1991, and the retirement of John Deacon in 1997. The Magic Tour took in 26 dates around Europe's stadiums, in support of their then latest album "A Kind of Magic".
Document 9: Freddie Mercury: The Great Pretender: Freddie Mercury: The Great Pretender is an Emmy/Rose d'Or award winning 2012 feature-length documentary about Queen singer Freddie Mercury and his attempt to forge a solo career. The documentary premiered on BBC One in edited form as part of the Imagine series, and later the Director's Cut was shown on BBC Four. It gained 3.5 million viewers when aired on BBC One in October 2012 and a further 1.2 million when shown on BBC Four.
Document 10: Tie Your Mother Down: "Tie Your Mother Down" is a song by the British rock band Queen, written by lead guitarist Brian May. It is the opening track and the second single from their 1976 album "A Day at the Races". On its original release as a single in 1977 the song peaked at 31 in the UK Singles Chart, however more than 20 years later it was released as a double a-side to "No-One But You (Only the Good Die Young)" where it reached 13 in UK Singles Chart. On the album the song is preceded by a one-minute instrumental intro featuring a Shepard tone melody, which is reprised in the ending of "Teo Torriatte": this was intended to create a "circle" in the album, typical, for example, of Pink Floyd's albums.
Document 11: Queen discography: Queen are a British rock band, which consisted of vocalist Freddie Mercury (d. 1991), guitarist Brian May, bassist John Deacon, and drummer Roger Taylor. Founded in 1970, Queen released their self-titled debut album in 1973. Despite not being an immediate success, Queen gained popularity in Britain with their second self-titled album in 1974. Their 1975 single, "Bohemian Rhapsody", was number 1 for nine weeks (and a further five weeks in 1991) and is the third biggest selling single of all time in the UK. The band's 1981 "Greatest Hits" album is the biggest selling album in UK history with 6.0 million copies sold by 2014. The band's 1991 compilation "Greatest Hits II" is also one of the UK's top ten biggest sellers of all time, with 3.8 million copies sold by 2012.
Document 12: The Freddie Mercury Album: The Freddie Mercury Album is a posthumous solo project with material from Queen frontman and vocalist Freddie Mercury released in 1992, to observe the anniversary of his death. The album is mainly made up of remixes from his past releases, as well as the original versions of "Barcelona", "Love Kills", "Exercises in Free Love", and "The Great Pretender". A week later, The Great Pretender, its US counterpart, was released.
Document 13: Too Much Love Will Kill You: "Too Much Love Will Kill You" is a song written by British guitarist Brian May of Queen, Frank Musker, and Elizabeth Lamers. The song reflected the breakdown of May's first marriage and attraction to his future wife, Anita Dobson. It was first recorded by Queen around 1988 or before, and was intended to be on the band's "The Miracle" album in 1989, but did not make the cut due to legal disputes following the band's decision that all songs on the album would be written by the group as opposed to individuals. After Freddie Mercury's death in 1991, May arranged a solo version, which he performed at the Freddie Mercury Tribute Concert in 1992, and subsequently included on his solo album "Back to the Light" that same year. Released as a single, it reached No. 5 on the UK Singles Chart. Because it was first played publicly at The Freddie Mercury Tribute Concert, a common misconception is that it was written as a tribute to Freddie Mercury, although it had actually been written several years before he died.
Document 14: Bicycle Race: "Bicycle Race" is a single by the British rock band Queen. It was released on their 1978 album "Jazz" and written by Queen's frontman Freddie Mercury. It was released as a double A-side single together with the song "Fat Bottomed Girls". The song is notable for its video featuring a bicycle race with nude women at Wimbledon Stadium, which was edited or even banned in several countries.
Document 15: David Bowie: David Robert Jones (8 January 1947 – 10 January 2016), known professionally as David Bowie ( ), was an English singer, songwriter and actor. He was a leading figure in popular music for over five decades, acclaimed by critics and other musicians for his innovative work. His career was marked by reinvention and visual presentation, his music and stagecraft significantly influencing popular music. During his lifetime, his record sales, estimated at 140 million albums worldwide, made him one of the world's best-selling music artists. In the UK, he was awarded nine platinum album certifications, eleven gold and eight silver, releasing eleven number-one albums. In the US, he received five platinum and nine gold certifications. He was inducted into the Rock and Roll Hall of Fame in 1996.
ground_truth: Queen