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: Basinger was born in Athens, Georgia, on December 8, 1953
Example solution: December 8, 1953
Example explanation: The output is correct as it is a valid text span, is of minimal length and is the correct date of birth.

Problem: Forest Steven Whitaker was born on July 15, 1961, in Longview, Texas, the son of Laura Francis (née Smith), a special education teacher who put herself through college and earned two master's degrees while raising her children, and Forest E

Solution: July 15, 1961