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]: Fassbender was born in Heidelberg on 2 April 1977, the son of Northern Irish mother Adele (from Larne) and German father Josef Fassbender
[EX A]: 2 April 1977

[EX Q]: Clooney was born on May 6, 1961 in Lexington, Kentucky
[EX A]: May 6, 1961

[EX Q]: Hayley Elizabeth Atwell was born on 5 April 1982 in London, an only child
[EX A]:
5 April 1982