Question: When was the sister of Maggie Keenan-Bolger born? 
Context: Margaret "Maggie" Keenan-Bolger (born December 2, 1983) is an American actress, singer, playwright, applied theatre practitioner, sex educator and founder of Honest Accomplice Theatre.  She is the sister of Tony Award nominee Celia Keenan-Bolger and Broadway actor Andrew Keenan-Bolger. Andrew Keenan-Bolger (born May 16, 1985 in Detroit, Michigan) is an American musical theatre actor and singer.  He has performed in many national tours and Broadway productions. Celia Keenan-Bolger (born January 26, 1978) is an American actress and singer. Maggie Stone is a fictional character from the American daytime drama "All My Children".  She was portrayed by actress Elizabeth Hendrickson, who also portrayed Maggie's identical twin sister Frankie Stone.  The character came to Pine Valley in 2002 after Frankie's death, and dated Bianca Montgomery while investigating her sister's demise.  The series portrayed Bianca as having fallen in love with Maggie, with Maggie initially maintaining that she is only interested in men.  The series featured her dating several men, taking a few of them to bed, sometimes out of confusion and other times out of a clear attempt to dispel her growing romantic attraction to Bianca.  The two eventually become lovers, though heartbreak follows. Margaret "Maggie" Cooke (née Preston, previously Clegg) is played by Irene Sutcliffe.  She ran the Corner Shop from 1968 to 1974.  Maggie's storylines included her life with alcoholic husband Les Clegg, who she divorced in 1969, her adopted son Gordon (her sister Betty Turpin was his birth mother) and a further marriage to reformed alcoholic, Ron Cooke, on 10 July 1974.  She emigrated to Zaire after the wedding but made a brief return to the street in December of the same year when Gordon found out that Betty was his mother.  She rejoined her husband the following month and has not returned to the street since. Maggie Shiu Mei-kei (born 1965), sometimes credited as Maggie Siu or Maggie Shaw, is a prominent Hong Kong actress. From the Inside, Out is a theatrical piece originally created by Maggie Keenan-Bolger from a series of personal interviews.  Dealing primarily with the issue of self-injury in the form of "cutting," the play imparts a larger message about the many ways in which people abuse their bodies and minds as coping mechanisms to deal with daily life. Margaret Evelyn "Maggie" Simpson is a fictional character in the animated television series "The Simpsons".  She first appeared on television in the "Tracey Ullman Show" short "Good Night" on April 19, 1987.  Maggie was created and designed by cartoonist Matt Groening while he was waiting in the lobby of James L. Brooks' office.  She received her first name from Groening's youngest sister.  After appearing on "The Tracey Ullman Show" for three years, the Simpson family was given their own series on the Fox Broadcasting Company which debuted December 17, 1989. Pablo John Fiel Garcia (born May 19, 1967) is a Filipino politician.  A member of NUP, United Nationalist Alliance and the One Cebu party, Garcia was elected to the House of Representatives of the Philippines in 2007 and 2010, representing the Third District of Cebu.  In the 2013 elections, he ran for Governor of Cebu due to his sister Gwen being barred to run for another term.  He was defeated by Hilario Davide III, the son of former Chief Justice of the Supreme Court Hilario Davide, Jr.. Cyril Turpin is played by William Moore.  Policeman Cyril arrived in Coronation Street with his wife Betty Turpin in 1969, moving into the flat above the Corner Shop, which was owned by Betty's sister Maggie Clegg.  Betty had moved there so that she could be there to support Maggie when her son Gordon Clegg moved to London.  The Street residents enjoyed having a police officer living in their midst and often looked to him for legal advice, and in return Cyril exercised his hands-on approach to the law by giving neighbours a friendly warning before intervening when they were flouting the law.  As the go-to man for many a crisis, Cyril soon got to know the locals and involved himself in community events, including a pub football match and the Rovers Christmas concert, in which he acted as Master of Ceremonies.
Answer: January 26, 1978