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'.

Input: Consider Input: Smith was born on September 25, 1968, in Philadelphia, Pennsylvania, to Caroline (nee Bright), a Philadelphia school board administrator, and Willard Carroll Smith Sr

Output: September 25, 1968

Input: Consider Input: Catherine Elise Blanchett was born on 14 May 1969 in the Ivanhoe suburb of Melbourne

Output: 14 May 1969

Input: Consider Input: Katherine Victoria Litwack was born on June 13, 1986, in Bryn Mawr, Pennsylvania
Output: June 13, 1986