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'.

[EX Q]: Smith was born on September 25, 1968, in Philadelphia, Pennsylvania, to Caroline (nee Bright), a Philadelphia school board administrator, and Willard Carroll Smith Sr
[EX A]: September 25, 1968

[EX Q]: Hans Lundgren was born on 3 November 1957 in Spanga, the son of Sigrid Birgitta (nee Tjerneld; 19321992), a language teacher, and Karl Hugo Johan Lundgren (19232000), an engineer (M
[EX A]: 3 November 1957

[EX Q]: Howard was born in Chicago, Illinois, on March 11, 1969, to Tyrone and Anita (nee Williams) Howard, both of whom were biracial, with African and Anglo ancestry
[EX A]:
March 11, 1969