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: Lena Kathren Headey was born in Hamilton on the island of Bermuda on 3 October 1973, the daughter of English parents Sue and John Headey
Example Output: 3 October 1973

Example Input: Cara Jocelyn Delevingne was born on 12 August 1992, in Hammersmith, London, the daughter of Pandora Anne Delevigne (née Stevens) and property developer Charles Hamar Delevingne
Example Output: 12 August 1992

Example Input: Ferrell was born on July 16, 1967 in Irvine, California, to Betty Kay (née Overman; born 1940), a teacher who taught at Old Mill School elementary school and Santa Ana College and Roy Lee Ferrell Jr
Example Output:
July 16, 1967

