Question: In what year was the mother of Karigaila born?

Context articles: Barbara Carrasco
Kweku Elliot
Early life of Habib Bourguiba
Uliana of Tver
Essie Mae Washington-Williams
Andrew Fekete (artist)
Rose Porter
Jane McKechnie Walton
Karigaila
List of EastEnders characters (2015)

Carrasco was born in El Paso, Texas to Mexican-American parents.
 She was the second-oldest child and oldest girl in her family.
 She had two brothers and two sisters growing up.
 When she was around a year or so of age, her family moved to Los Angeles.
 They lived in government Veteran's housing in Culver City since her father was a Korean War Navy veteran.
 She recalls that they were poor and lived off of food stamps.
 Carrasco's childhood growing up in the predominantly Mexican-American and African-American community of Mar Vista Gardens was sometimes painful, because she was teased for having lighter skin than her peers and stood out for her green eyes; being called "white girl," "green eyes" and ""güera"."
 Her experiences with being simultaneously perceived as not truly Mexican-American and being told to "take advantage of being light skinned" makes up of part of her artistic subject matter later on in life.
 Carrasco said that her father encouraged her to broaden her horizons, go to college and encouraged her artwork.
 He had appreciated art and he was considered artistic.
 Her father, who worked as a bus driver for Santa Monica Bus Lines said that "anybody could be a bus driver but not everybody could be an artist."
 Carrasco's father died of a heart attack when she was twelve and it was difficult for her because she was always close to her father.
 Carrasco's mother, who also volunteered as a Girl Scout leader, was also artistically inclined.
 Her mother admired Japanese art and decorated the house with it.
 Carrasco felt that growing up with Japanese images influenced her sense of line.
 She also felt that her mother was a personal role model because she was a strong woman.
 Her mother was also, however, very protective of her girls, and she expected Carrasco to act as a role model of traditional femininity for her sisters.
Born to a Ghanaian father and Trinidadian mother, Kweku Elliot is of mixed heritage.
 His father Kojo Elliot was a lawyer, and his mother Henrietta Elliot a school teacher.
 Elliot was born in Takoradi, Ghana's Western Region.
 His family moved to Accra when he was 5 years old, a year later his father Kojo Elliot died.
 He attended SOS Herman Gmeiner International School with his elder sister Essie, the same school in which his mother had also taught.
 During his high school years he attended Akosombo International School, and later switched to Mfantsipim School.
 In his late teens Elliot moved to The United Kingdom and attended Arts University Bournemouth, during his stay in the UK he has stated in interviews that he worked as a model, and did the odd job here and there in order to make ends meet.
Habib Bourguiba was officially born on August 3, 1903, in Monastir to Ali Bourguiba (1850–1925) and Fattouma Khefacha (1861–1913).
 Being their eighth and last child, his birth was a shame to his mother and a worry to his father, who conceived him in an advanced age.
 Born into a modest family, the young Habib was raised in a female environment and was marked by gender inequality.
 Despite his financial conditions, Ali Bourguiba decided to invest his money in the education of his son and therefore, avoid him his fate of being enrolled in the army.
 Likewise, he sent his son to Tunis, circa 1907, to live with his brother M'hamed, in order to study in elementary school of Sadiki.
 Separated from his mother at 5, he lived in modest conditions in the capital city, and the Jellaz Affair made a deep impression on him.
 In 1913, he obtained his Certificat d'études primaires to the relief of his father, exempting him from military service and permitted him to pursue his secondary education in Sadiki.
 However, in the same year, he lost his mother at the age of 10, which marked his entire life.
Uliana Alexandrovna of Tver (Russian: Ульяна Александровна Тверская ;  1325 – 17 March 1391) was a daughter of Prince Alexander of Tver and Anastasia of Halych (daughter of Yuri I of Galicia).
 She was the second wife of Algirdas, Grand Duke of Lithuania.
Essie Mae Washington-Williams (October 12, 1925 – February 4, 2013) was an American teacher, author, and writer.
 She is best known as the oldest child of Strom Thurmond, Governor of South Carolina and longtime United States Senator, known for his pro-racial segregation policies.
 Of mixed race, she was born to Carrie Butler, a 16-year-old African-American girl who worked as a household servant for Thurmond's parents, and Thurmond, then 22 and unmarried.
 Washington-Williams grew up in the family of one of her mother's sisters, not learning of her biological parents until 1938 when her mother came for a visit and informed Essie Mae she was her mother.
 She graduated from college, earned a master's degree, married, raised a family, and had a 30-year professional career in education.
Andrew Julian Fekete was born at St Mary's Hospital, Paddington, London on 1 May 1954.
 His parents, Andrew Fekete, and Elizabeth née Szeleczky, were displaced people at the end of the Second World War, coming to the UK as refugees under the official Resettlement Programmes; first his mother in 1947, followed by his father a year later in 1948.
 The Fekete family originates from Transylvania, while the Szeleczky family trace their origins to the Alfold plain of Hungary.
 After escaping from Hungary during the period of the Stalinist regime of Mátyás Rákosi, Andrew's father became a successful restaurateur in the West End of London, while his mother trained as a nurse.
 After the birth of his brother Peter in 1958 and his sister Elizabeth in 1959, Andrew's mother returned to work as a night-sister at a hospital in Croydon.
Rose Porter (6 December 1845 - 10 September 1906) was an American religious novelist.
 She was born in New York, New York.
 Her father, David Collins Porter, was a wealthy New Yorker.
 He died in 1845, while Rose was an infant.
 Her mother, Rose Anne Hardy, was the daughter of an English army officer.
 Porter's early years were spent in New York and in the family's summer home in Catskills-on-the-Hudson.
 She was educated in New York, with the exception of a year abroad.
 After completing her education, she and her mother made their home in New Haven, Connecticut.
 After the mother died, Porter kept her home in New Haven, where she lived with her servants.
 Her first success was "Summer Drift-Wood for the Winter Fire".
 Notwithstanding the fact that she was an invalid for years, Porter was a writer of quiet religious romance, publishing or editing 70 volumes.
Jane McKechnie Walton was born on July 16, 1847 in Edinburgh, Scotland.
 She was the daughter of Jane (Jean Tinto) Bee and John McKechnie.
 Her father was a bell molder by trade and died of typhoid on January 3, 1848 when Jane was just eighteen months old.
 Her grieving mother gave birth to the McKechnie's only son a few months later.
 Within another year, Jane's mother was taught about The Church of Jesus Christ of Latter-day Saints (LDS Church) by two Mormon missionaries.
 She believed their words and was baptized into the LDS Church on February 21, 1850.
 Several months later, Jane's grandmother, uncle and aunt followed her mother, Jean's footsteps and also joined the newfound religion.
 By September 1850, Jane's mother, grandmother, uncle, aunt and her own brother and sister were booked for ocean travel on The North Atlantic ship which was bound for New Orleans in America.
Karigaila (Polish: "Korygiełło" , died on 16 September 1390 in Vilnius) was a son of Algirdas, Grand Duke of Lithuania, and his second wife Uliana of Tver.
 He became the ruler of Mstsislaw after he captured it from the Principality of Smolensk.
 He is sometimes mistaken for his brother Constantine, who was the founder of the House of Czartoryski.
The following is a list of characters that first appeared in the BBC soap opera "EastEnders" in 2015, by order of first appearance.
 All characters were introduced by the show's executive producer Dominic Treadwell-Collins.
 January saw the arrival of the year's first baby, Matthew Mitchell Cotton, son of Ronnie Mitchell and Charlie Cotton.
 The following month saw the show celebrate its 30th anniversary with a live week, which oversaw the live arrivals of Vincent Hubbard, and the second baby born in 2015, Pearl Fox-Hubbard, Vincent's daughter with Kim Fox-Hubbard.
 In March, Claudette Hubbard arrived as Donna Yates' foster mother and an acquaintance of Les Coker followed by Stan Carter's friend Cyril Bishop and Sharon Mitchell's aunt Margaret Midhurst, whilst Denise van Outen joined in April as Karin Smart.
 May saw the arrivals of June Whitfield as Sister Ruth, Mick and Linda Carter's son Ollie Carter, the year's third baby, Mo Harris' business associate Fat Elvis and Kush Kazemi's mother, Carmel.
 Paul Coker, the grandson of Les and Pam Coker, was introduced in June, as was Jade Green, the long-lost daughter of Shabnam Masood and Dean Wicks.
 After Kathy Sullivan's surprise return during the 30th anniversary in February, her husband Gavin Sullivan made his debut in August.
 September saw the arrivals of Max Branning's prosecution lawyer Hazel Warren and Louie Beale, the baby son of Lauren Branning and Peter Beale.
 In October, Elaine Peacock's toyboy lover Jason Adams was introduced, as well as first transgender character to be played by a transgender actor, Kyle Slater.
 December saw the birth of the year's fifth baby, Kush and Stacey Slater's son, Arthur Fowler.