Question: Who was the mother of the Read My Lips performer?

full_context: Document 1: Eileen Power: Eileen Power was the eldest daughter of a stockbroker and was born at Altrincham (now part of Greater Manchester) in 1889. She was a sister of Rhoda Power, the children's writer and broadcaster. When she was three her father, a stockbroker, was arrested for fraud and the family moved to Bournemouth. After her mother died of tuberculosis when Power was only 14, she moved to Oxford with her two sisters to live with her aunt. Power was educated at Oxford High School for Girls, Girton College, Cambridge, and the Sorbonne.
Document 2: 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 3: 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 4: Mixed Up World: "Mixed Up World" is a song by British singer-songwriter Sophie Ellis-Bextor, released in 2003 as the first single from her second studio album, "Shoot from the Hip". It peaked at #7 on the UK Singles Chart. It was considered somewhat of a success. The single includes an easy-listening, chillout B-side, called "The Earth Shook the Devil's Hand". The video for the song features various dancers wearing a mix of bright and dark colours. It also features men in bowler hats as Sophie moves between giant black and white punctuation marks. It was directed by Rupert Jones. It was the first video that shows Sophie's blonde hairstyle. A short clip from the video was featured in an ad on Australia's VH1 channel in June 2006. "Mixed Up World" sold 35,000 copies in the United Kingdom.
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: 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 7: 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 8: 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.
Document 9: Groovejet (If This Ain't Love): "Groovejet (If This Ain't Love)" is a song by Italian electronic music producer Spiller, featuring vocals from British singer and songwriter Sophie Ellis-Bextor. The single was released in August 2000 by Positiva Records. It peaked at number one in the UK, New Zealand, Ireland and Australia, as well as charting at number three on the American Hot Dance Chart. On 15 September 2000, the song was certified gold record status by the British Phonographic Industry, and was certified platinum on 22 July 2013. Various versions of the single were later featured on the German reissue and some UK editions of Ellis-Bextor's debut solo album, "Read My Lips".
Document 10: 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 11: 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 12: Get Over You / Move This Mountain: "Get Over You" and "Move This Mountain" are two songs recorded by British pop singer Sophie Ellis-Bextor. In most countries, "Get Over You" was released as the sole single, but in the United Kingdom, the two tracks were released as a double A-side single on 10 June 2002. The former track was taken off the "Read My Lips" album reissue, while the latter was an album track in the original album release.
Document 13: 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 14: Me and My Imagination: "Me and My Imagination" is a song by British recording artist Sophie Ellis-Bextor for her third studio album, "Trip the Light Fantastic" (2007). It was written by Ellis-Bextor, Hannah Robinson and co-written and produced by Matt Prime. It is a dance-pop, disco song and its lyrics advise an overeager suitor to play harder to get. Some critics noted that it recalls the songs from her first studio album, "Read My Lips" (2001).
Document 15: 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.
ground_truth: Janet Ellis
sub_queries: Read My Lips >> performer Answer: Sophie Ellis-Bextor
Which lady gave birth to Sophie Ellis-Bextor ? Answer: Janet Ellis