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: Kellan Christopher Lutz was born on March 15, 1985, in Dickinson, North Dakota, the son of Karla (née Theesfeld; b
Example Output: March 15, 1985

Example Input: Jordana Brewster was born in Panama City, Panama, on April 26, 1980, the older of two daughters
Example Output: April 26, 1980

Example Input: Johansson was born on November 22, 1984, in the Manhattan borough of New York City
Example Output:
November 22, 1984