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: Atkinson was born in Consett, County Durham, England, on 6 January 1955
Example Output: 6 January 1955

Example Input: Rami Said Malek was born in Torrance, California, on May 12, 1981, the son of Egyptian immigrant parents Nelly Abdel-Malek and Said Malek
Example Output: May 12, 1981

Example Input: Benson was born on December 18, 1989, in Anaheim Hills, California, to parents Shannon and Jeff Benson
Example Output:
December 18, 1989