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'.

Example Input: Eva Gaëlle Green was born two minutes earlier than her fraternal twin sister, Joy, on 6 July 1980
Example Output: 6 July 1980

Example Input: Roberts was born on October 28, 1967, in Smyrna, Georgia, a suburb of Atlanta, to Betty Lou Bredemus (1934–2015) and Walter Grady Roberts (1933–1977)
Example Output: October 28, 1967

Example Input: Dormer was born in Reading, Berkshire, England, on 11 February 1982, daughter of Gary Dormer and wife Claire Richards and sister of Mark Dormer and Samantha Dormer
Example Output:
11 February 1982