Q: 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'.
Christopher Michael Pratt was born on June 21, 1979, in Virginia, Minnesota, the youngest child of Kathleen Louise (née Indahl), who worked at a Safeway supermarket, and Daniel Clifton Pratt, who worked in mining and later remodeling houses
A:
June 21, 1979