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'.

Julia Elizabeth Wells was born on 1 October 1935 in Walton-on-Thames, Surrey, England
1 October 1935

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

Howard was born in Chicago, Illinois, on March 11, 1969, to Tyrone and Anita (née Williams) Howard, both of whom were biracial, with African and Anglo ancestry

March 11, 1969