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: Claudia Cardinale was born Claude Joséphine Rose Cardinale in La Goulette, a neighbourhood of Tunis, French protectorate of Tunisia, on 15 April 1938
Example Output: 15 April 1938

Example Input: Edward Thomas Hardy was born in the Hammersmith district of London on 15 September 1977, the only child of artist and painter Anne (née Barrett) and novelist and comedy writer Edward "Chips" Hardy
Example Output: 15 September 1977

Example Input: Natalie Herschlag was born on June 9, 1981, in Jerusalem, to parents of Ashkenazi Jewish descent
Example Output:
June 9, 1981