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: Fiennes was born in Ipswich, England on 22 December 1962
Example Output: 22 December 1962

Example Input: Duvall was born January 5, 1931, in San Diego, California, the son of Mildred Virginia (née Hart; 1901–1985), an amateur actress, and William Howard Duvall (1904–1984), a Virginia-born U
Example Output: January 5, 1931

Example Input: Selma Blair Beitner was born on June 23, 1972, in Southfield, Michigan, a suburb of Detroit
Example Output:
June 23, 1972