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: Edward John David Redmayne was born on 6 January 1982 in Westminster in London
Example Output: 6 January 1982

Example Input: Fassbender was born in Heidelberg on 2 April 1977, the son of Northern Irish mother Adele (from Larne) and German father Josef Fassbender
Example Output: 2 April 1977

Example Input: Cruise was born on July 3, 1962, in Syracuse, New York, to electrical engineer Thomas Cruise Mapother III (1934–1984) and special education teacher Mary Lee (née Pfeiffer; 1936–2017)
Example Output:
July 3, 1962