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'.

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
December 18, 1963

Garrett John Hedlund was born on September 3, 1984, in Roseau, Minnesota, to Kristine Anne (née Yanish) and Robert Martin Hedlund
September 3, 1984

Beckinsale was born on 26 July 1973 in the Chiswick district of London, the only child of actors Richard Beckinsale and Judy Loe

26 July 1973

