Question: Who is the mother of the singer of Young Blood?

full_context: Document 1: Youngblood (5 Seconds of Summer album): Youngblood is the third studio album by Australian rock band 5 Seconds of Summer, released on 15 June 2018. The band announced the release of the album on Twitter on 9 April 2018. Along with the album's announcement, the band also revealed they will embark on the Meet You There Tour to support the album, with 25 dates announced in North America to begin in late 2018. The US Target edition of the album will be available with four covers, each featuring a member of the band. The album was first announced for release on 22 June 2018, but its release date has since been brought forward to 15 June 2018.
Document 2: Juno Temple: Temple was born in Hammersmith, London, the daughter of producer Amanda Pirie and film director Julien Temple. Her aunt is politician Nina Temple. She grew up in Taunton, Somerset, and attended Enmore Primary School, Bedales School, and King's College, Taunton. She has two younger brothers: Leo and Felix.
Document 3: Nicola Roberts: Roberts was born in Stamford, Lincolnshire, when her mother was 17. At the time of her birth, her father was working for the RAF and the resulting pay led to financial struggles which saw her father move to work for Ford Motor Company whilst her mother became a photographer to help the family monetary problems. Roberts grew up in Runcorn, Cheshire.
Document 4: Youngblood (5 Seconds of Summer album): Youngblood is the third studio album by Australian pop rock band 5 Seconds of Summer, released on 15 June 2018. The band announced the release of the album on Twitter on 9 April 2018. Along with the album's announcement, the band also revealed they will embark on the Meet You There Tour to support the album, with 25 dates announced in North America to begin in late 2018. The album was first announced for release on 22 June 2018, but its release date was later brought forward to 15 June 2018. The US Target edition of the album was made available with four covers, each featuring a member of the band.
Document 5: Starlight (Sophie Ellis-Bextor song): "Starlight" is a pop song released by British singer-songwriter Sophie Ellis-Bextor as the sixth overall single from her fourth studio album, "Make a Scene". It was released on 5 June 2011, in the United Kingdom as a digital download, a week before the release of the album. Ellis-Bextor appeared on various talk shows to promote the single prior to its release. The song also served as the lead single in Australia and Italy, released on 23 September 2011 a week ahead of the album release there. It's her first single as an independent artist with her label EBGB's.
Document 6: Young Blood (Sophie Ellis-Bextor song): "Young Blood" is a song by English recording artist Sophie Ellis-Bextor from her fifth studio album "Wanderlust" (2014). The song was released as the album's lead single on 21 November 2013. It was co-written by Ed Harcourt and Ellis-Bextor; the former also produced it. The song is a chamber pop piano ballad, which features instrumentation from subdued drums and various string instruments. In the track, Ellis-Bextor sings with restrain, incorporating a low register in the verses and hitting her highest note in the chorus. A demo version of the track was offered online in March 2013.
Document 7: Samantha Bee: Bee was born in Toronto, Ontario, the daughter of Debra and Ronald Bee. She has said of her family: "Dating from well before the turn of the 20th century, if there has ever been a successful, happy marriage in my family lineage, I've yet to hear about it." Bee's parents split up soon after her birth, and she was initially raised by her grandmother, who worked as a secretary at the Catholic school Bee attended, on Roncesvalles Avenue during her childhood. She attended Humberside Collegiate Institute and York Memorial Collegiate Institute.
Document 8: Make a Scene: Make a Scene is the fourth studio album by English singer and songwriter Sophie Ellis-Bextor, released in Russia on 18 April 2011 by Universal Music Group and in the United Kingdom on 13 June 2011 by Ellis-Bextor's own record label, EBGB's. It is her first studio album since "Trip the Light Fantastic" (2007).
Document 9: Laura Bates: Bates was born on 27 August 1986 in Oxford to a mother who taught French and a physician father, and grew up in Hackney and Taunton, and has an older sister and a younger brother. Her parents divorced when Bates was in her twenties. She read English literature at St John's College, Cambridge, and graduated from the University of Cambridge in 2007. Bates remained in Cambridge for two and a half years as a researcher for the psychologist Susan Quilliam who was working on an updated edition of The Joy of Sex.
Document 10: Read My Lips (Sophie Ellis-Bextor album): Read My Lips is the debut studio album by English singer Sophie Ellis-Bextor. It was released on 27 August 2001 by Polydor Records. After the disbandment of the Britpop group Theaudience, in which Ellis-Bextor served as vocalist, she was signed to Polydor. Prior to the LP's completion, the singer collaborated with several musicians, including band Blur's bassist Alex James, Moby and New Radicals frontman Gregg Alexander. The record was described as a collection of 1980s electronica and 1970s disco music.
Document 11: India Jane Birley: Born in London, she is the daughter of Lady Annabel Vane-Tempest-Stewart, from her marriage to nightclub mogul Mark Birley. She has two brothers, Rupert (presumed deceased) and Robin; and three half-siblings, Zac, Jemima, and Ben Goldsmith from her mother's affair with James Goldsmith, the man who would become her second husband.
Document 12: Off & On: "Off & On" is a pop song released by British recording artist Sophie Ellis-Bextor as the fifth overall single from her fourth studio album, "Make a Scene". It was released on 11 April 2011, exclusively in the Russian Federation as a digital download, a week before the release of the album there. Ellis-Bextor appeared on various talk shows in the United Kingdom to promote the song, including "The Rob Brydon Show", despite it not being released as a single there.
Document 13: Catch You: "Catch You" is a song by the British recording artist Sophie Ellis-Bextor for her third album, "Trip the Light Fantastic" (2007). It was written by Cathy Dennis, Rhys Barker and Greg Kurstin and produced by Kurstin. It was released as the album's first single on 19 February 2007. "Catch You" is a pop rock song and talks about Bextor chasing the guy that she wants.
Document 14: Sophie Ellis-Bextor: Ellis-Bextor was born in London to Janet Ellis, who was later a presenter on BBC's children's television programmes "Blue Peter" and "Jigsaw", and Robin Bextor, a film producer and director: they separated when she was four. As a child, Ellis-Bextor occasionally appeared on "Blue Peter" alongside her mother, who presented the programme.
Document 15: Jess Glynne: Jess Glynne was born in Hampstead and raised in Muswell Hill, North London, in a Jewish family. Her father, Laurence Glynne, is an estate agent; and her mother, Alexandra (née Ingram), worked in A&R in the music industry. The family name was originally Goldstein, but her grandfather changed it to Glynne. She applied for the television show "The X Factor" when she was 15 years old, but dropped out of the audition process following a disagreement with the producers. She attended Rhodes Avenue Primary School, then attended Fortismere School, where she completed her A-levels in 2008, and took various jobs at a boutique, a fitness centre and a hairdresser's. After a period spent travelling the world, Glynne worked for a music management company in her late teens and began networking with songwriters and producers, eventually honing her artistry for four years.
ground_truth: Janet Ellis
sub_queries: Young Blood >> performer Answer: Sophie Ellis-Bextor
Which lady gave birth to Sophie Ellis-Bextor ? Answer: Janet Ellis