Question: Mary Soames' mother was born on what date?

Context paragraphs:
Emma Soames: Emma Soames (born 9 September 1949) is a British editor.  She is the granddaughter of Winston Churchill via her mother Mary, Baroness Soames, and the one-time girlfriend of Martin Amis.

Dormition of the Mother of God: The Dormition of the Mother of God (Greek: Κοίμησις Θεοτόκου , "Koímēsis Theotokou" often anglicized as "Kimisis", Slavonic: Успение Пресвятыя Богородицы, "Uspenie Presvetia Bogoroditsi") is a Great Feast of the Eastern Orthodox, Oriental Orthodox and Eastern Catholic Churches which commemorates the "falling asleep" or death of Mary the "Theotokos" ("Mother of God", literally translated as "God-bearer"), and her bodily resurrection before being taken up into heaven.  It is celebrated on August 15 (August 28, N.S. for those following the Julian Calendar) as the Feast of the Dormition of the Mother of God.  The Armenian Apostolic Church celebrates the Dormition not on a fixed date, but on the Sunday nearest August 15.

Mary Elizabeth Lease: Mary Elizabeth Lease (September 11, 1850 – October 29, 1933) was an American lecturer, writer, and political activist.  She was an advocate of the suffrage movement as well as temperance but she was best known for her work with the Populist party.  She was born to Irish immigrants Joseph P. and Mary Elizabeth (Murray) Clyens, in Ridgway, Pennsylvania.  In 1895, she wrote "The Problem of Civilization Solved", and in 1896, she moved to New York City where she edited the democratic newspaper, "World".  In addition, she worked as an editor for the "National Encyclopedia of American Biography".  Mary Elizabeth Lease was also known as Mary Ellen Lease.  She was called "Queen Mary" (after the British Queen consort, Mary of Teck), "Mother Lease" by her supporters and "Mary Yellin" by her enemies.  Lease died in Callicoon, New York.

Mary Anna Marten: Mary Anna Sibell Elizabeth Marten, OBE (1929–2010) was born Mary Anna Sibell Elizabeth Sturt on 12 September 1929 at Moor Critchel, the daughter of Napier Sturt, 3rd Baron Alington and Lady Mary Sibell Ashley-Cooper, daughter of the 9th Earl of Shaftesbury, sometime Lord Steward to the Household of George V & Queen Mary, by his wife Lady Constance Sibell Grosvenor (d 1957), a great friend of Queen Mary, dau of Earl Grosvenor, and sister of Hugh Grosvenor, 2nd Duke of Westminster.  She was god-daughter to Queen Elizabeth (later The Queen Mother), and in 1953 her son Napier was a page at the Coronation of Elizabeth II.

Mary Soames: Mary Soames, Baroness Soames, ("née" Spencer-Churchill; 15 September 1922 – 31 May 2014) was the youngest of the five children of Winston Churchill and his wife, Clementine.  She was the wife of Christopher Soames.

The Destiny of The Mother Church: The Destiny of The Mother Church, by Bliss Knapp is a controversial book published by Christian Science Publishing Society in 1991.  Knapp and his parents, Ira O. and Flavia Stickney Knapp, all knew Mary Baker Eddy.  His parents were students of hers and his father was one of the original members of the Board of Directors of The Mother Church.  Until 1991, the book was repeatedly rejected for publication by the Christian Science Board of Directors because of the depiction of Eddy as the fulfillment of biblical prophecy and equating her with Christ Jesus, a position which Eddy considered blasphemous.  Eddy identified the woman in the Book of Revelation not as a person, but as "generic man".  "Destiny's" publication caused divisions within the church, including several resignations of prominent church employees.  Critics claimed that the failure of the church's then-recent television venture, which had cost the church several hundred million dollars, had motivated the Board's reversal on publishing Knapp's book.  Knapp, his wife and her sister left wills that granted bequests totalling over $100 million (in 1990s dollars) promised to the church if the book were to be published.  The wills set a time limit of 20 years for the book to be published, otherwise the bequests were to be divided between Stanford University and the Los Angeles County Museum of Art, and the church would receive nothing.  The 1973 death of Knapp's wife set the date of the time limit to May 1993.

Māras: Māras (] ) or Māra Day (sometimes referred as Great Māra Day or Mother Day) was a Latvian festival, devoted to Māra, an ancient deity, and was celebrated on 15 August.  According to solar calendar, Māras marks the midpoint between Jāņi, which is summer solstice, and Miķeļi, that represents the end of the harvest season.  The actual date, likely, is the result of Christian influence, identifying Māra with Virgin Mary, whose devoted holiday (Assumption of Mary) is observed on 15 August.

Love and Mary: Mary Wilson, a born and bred Texan, moves to Los Angeles to open a high class bakery, and get away from her wacky family.  After initial success she faces eviction when a bad review and a run of poor sales coincide.  Hoping to raise money from engagement presents she decides to visit her family in Texas with her fiancé, Brent.  Brent comes down with an allergy before the trip and she takes his twin brother Jake, a jailbird, to pretend to be Brent.  While in Texas she falls in love with Jake, and he with her, despite some competition from Lucy, her childhood friend, who is in on the secret and assumes Jake is "available".  Brent arrives during the engagement party and take Mary back to Los Angeles, where Mary's bakery becomes a success after her grandfather gives her the award-winning recipes he and his wife collected over the years.  While setting a wedding date, Brent realizes they are not suited, Mary confesses her love to Jake, and Mary and Jake get married.

Clementine Churchill: Clementine Ogilvy Spencer-Churchill, Baroness Spencer-Churchill, ("née" Hozier; 1 April 1885 – 12 December 1977) was the wife of Sir Winston Churchill and a life peer in her own right.

Mary Mary: Mary Mary is an American contemporary gospel duo, consisting of sisters Erica Atkins-Campbell (born (1972--) 29, 1972 ) and Trecina Atkins-Campbell (born (1974--) 01, 1974 ).  The duo are often credited, along with Kirk Franklin, for broadening the fan base of urban contemporary gospel in the 2000s by introducing elements of soul music, hip hop, funk and jazz.  Mary Mary breakout song was "Shackles (Praise You)".  The group's name, as stated in an interview, is inspired by the two famous Marys from the Bible; Mary, the mother of Jesus Christ, and Mary Magdalene.

Supporting paragraphs: Mary Soames Clementine Churchill
Answer: 1 April 1885