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: 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: Tarantino was born on March 27, 1963, in Knoxville, Tennessee, the only child of Connie McHugh and aspiring actor Tony Tarantino, who left the family before his son's birth
Example Output: March 27, 1963

Example Input: Strong was born in the Islington district of London on 5 August 1963, the son of an Austrian mother and Italian father
Example Output:
5 August 1963