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'.

Q: James Harrison Coburn III was born in Laurel, Nebraska on August 31, 1928, the son of James Harrison Coburn II (1902–1975) and Mylet S.

A: August 31, 1928
****
Q: Colin James Farrell was born in the Castleknock suburb of Dublin on 31 May 1976, the son of Rita (née Monaghan) and Eamon Farrell

A: 31 May 1976
****
Q: Pitt was born on December 18, 1963, in Shawnee, Oklahoma, to William Alvin Pitt, the proprietor of a trucking company, and Jane Etta (née Hillhouse), a school counselor

A:
December 18, 1963
****
