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

[EX Q]: Leonard Simon Nimoy was born on March 26, 1931, in the West End of Boston, Massachusetts, United States to Jewish immigrants from Iziaslav (in present-day Ukraine)
[EX A]: March 26, 1931

[EX Q]: Born on 1 July 1985, Seydoux is the daughter of businessman Henri Jérôme Seydoux-Fornier de Clausonne and Valérie Schlumberger
[EX A]:
1 July 1985