Question: What is the birthdate of this English rock bassist and vocalist for funk rock pioneers, who recorded the album The Work Tapes?
Context: Red Hot Chili Peppers are an American funk rock band formed in Los Angeles in 1983.  The group's musical style primarily consists of rock with an emphasis on funk, as well as elements from other genres such as punk rock and psychedelic rock.  When played live, their music incorporates elements of jam band due to the improvised nature of many of their performances.  Currently, the band consists of founding members vocalist Anthony Kiedis and bassist Flea, longtime drummer Chad Smith, and former touring guitarist Josh Klinghoffer.  Red Hot Chili Peppers are one of the best-selling bands of all time with over 80 million records sold worldwide, have been nominated for sixteen Grammy Awards, of which they have won six, and are the most successful band in alternative rock radio history, currently holding the records for most number-one singles (13), most cumulative weeks at number one (85) and most top-ten songs (25) on the "Billboard" Alternative Songs chart.  In 2012, they were inducted into the Rock and Roll Hall of Fame. Glenn Hughes (born 21 August 1951) is an English rock bassist and vocalist, best known for playing bass and performing vocals for funk rock pioneers Trapeze, the Mk.  III and IV line-ups of Deep Purple, as well as briefly fronting Black Sabbath in the mid-1980s. Yes are an English rock band formed in London in 1968 by singer Jon Anderson, bassist Chris Squire, guitarist Peter Banks, keyboardist Tony Kaye, and drummer Bill Bruford.  The band have undergone numerous formations throughout their history; nineteen musicians have been full-time members.  Since June 2015, it has consisted of guitarist Steve Howe, drummer Alan White, keyboardist Geoff Downes, singer Jon Davison, and bassist Billy Sherwood.  Yes have explored several musical styles over the years, and are most notably regarded as progressive rock pioneers. Damon Che (born Damon Che Fitzgerald, Pittsburgh, Pennsylvania) is a rock drummer and guitarist.  He has contributed to indie rock and progressive rock through his work with math rock pioneers Don Caballero since 1991.  His style is heavily influenced by metal, hard rock, punk, jazz, and fusion. Glenn Hughes is an English rock bassist and vocalist. The Work Tapes is an album of demos recorded by vocalist Glenn Hughes (Deep Purple/ Black Sabbath/ Trapeze) and keyboardist Geoff Downes (Asia /Buggles /Yes).  The sessions were originally recorded in June 1991, but did not receive an official release until 1998. Jo Burt (born 1956) is an English rock bassist, guitar player, songwriter and vocalist.  He is possibly best known for being the bassist for Black Sabbath during their 1987 tour in support of the album "The Eternal Idol".  He left the band after the tour ended. Joe Lynn Turner (born Joseph Arthur Mark Linquito, August 2, 1951) is an American singer, guitarist, songwriter, and producer.  He is known for his work in the hard rock bands Rainbow and Deep Purple.  During his career, Turner fronted and played guitar with pop rock band Fandango in the late 1970s; and in the early 80s, he became a member of Rainbow, fronting the band and writing songs with guitarist, Ritchie Blackmore and bassist, and producer, Roger Glover.  After Rainbow had disbanded (the first time) in March 1984, he pursued a solo career, released one album, Rescue You, and then later did session work, singing background vocals for the likes of Billy Joel, Cher, and Michael Bolton.  On the advice of Bolton, Turner began recording jingles for radio and television.  Other songs he had composed or through collaboration with songwriters like Desmond Child and Jack Ponti were being recorded and released by international recording artists Jimmy Barnes, Lee Aaron, and Bonfire.  Turner had a short-lived association with neoclassical metal guitarist Yngwie Malmsteen and then Deep Purple.  From the mid-1990s, he resumed his solo career, releasing an additional nine studio and two live recordings.  Turner did other session work, appearing as lead vocalist on tribute albums and working on projects involving various musical groups including progressive rock band Mother's Army; Bulgarian hard rock band Brazen Abbot; funk rock duo Hughes Turner Project; and classic rock/ progressive rock band Rated X.  In 2006, Frontiers Records approached Turner to become involved with the AOR side project Sunstorm.  By 2016, four albums under the Sunstorm name had been released.  That same year, Turner released "The Sessions" via Cleopatra Records featuring a veritable who's who of classic rock royalty as guest musicians, before resuming his seemingly constant touring schedule back in Europe Jeff Brown is an English rock bassist/vocalist who is a member of the UK power pop rock band CATS in SPACE. This is the discography of Glenn Hughes English rock bassist and vocalist, best known for playing bass and performing vocals for funk rock pioneers Trapeze and the Mk.  III and IV line-ups of Deep Purple, as well as briefly fronting Black Sabbath in the mid-1980s.  In addition to being an active session musician, Hughes also maintains a notable solo career; in recent years, he has been the frontman of the supergroup Black Country Communion until their disband in 2013 and California Breed until their disband in 2015.
Answer: 21 August 1951