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: Eric Marlon Bishop was born in Terrell, Texas, on December 13, 1967
Example Output: December 13, 1967

Example Input: Bullock was born on July 26, 1964, in the Washington, DC.
Example Output: July 26, 1964

Example Input: McDowell was born Malcolm John Taylor on 13 June 1943 in Horsforth, West Riding of Yorkshire, the son of hotelier Edna (née McDowell) and RAF officer (and later pub owner) Charles Taylor
Example Output:
13 June 1943