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]: Joaquin Rafael Bottom was born on October 28, 1974, in the Río Piedras district of San Juan, Puerto Rico, to John Lee Bottom, the founder of a landscape gardening company, and Arlyn "Heart" Bottom (née Dunetz), a secretary at NBC
[EX A]: October 28, 1974

[EX Q]: McGregor was born on 31 March 1971 in Perth, Scotland, and was raised in nearby Crieff
[EX A]: 31 March 1971

[EX Q]: Jones was born on September 15, 1946, in San Saba, Texas
[EX A]:
September 15, 1946

