TASK DEFINITION: Given a short bio of a person, find the minimal text span containing the date of birth of the person. The output must be the minimal text span that contains the birth date, month and year as long as they are present. For instance, given a bio like 'I was born on 27th of Decemeber 1990, and graduated high school on 23rd October 2008.' the output should be '27th of December 1990'.
PROBLEM: Cara Jocelyn Delevingne was born on 12 August 1992, in Hammersmith, London, the daughter of Pandora Anne Delevigne (née Stevens) and property developer Charles Hamar Delevingne

SOLUTION: 12 August 1992

PROBLEM: Widmark was born December 26, 1914 in Sunrise Township, Minnesota, the son of Ethel Mae (née Barr) and Carl Henry Widmark

SOLUTION: December 26, 1914

PROBLEM: Hurt was born John Vincent Hurt on 22 January 1940 in Chesterfield, Derbyshire, the son of Phyllis (née Massey; 1907–1975), an engineer and one-time actress, and Arnold Herbert Hurt (1904–1999), a mathematician who became a Church of England clergyman and served as vicar of Holy Trinity Church in Shirebrook, Derbyshire

SOLUTION:
22 January 1940