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'.

[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)
[A]: March 26, 1931

[Q]: Cara Jocelyn Delevingne was born on 12 August 1992, in Hammersmith, London, the daughter of Pandora Anne Delevigne (nee Stevens) and property developer Charles Hamar Delevingne
[A]: 12 August 1992

[Q]: Thomas Connery was born at the Royal Maternity Hospital in Edinburgh, Scotland on 25 August 1930; he was named after his paternal grandfather
[A]:
25 August 1930