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'.
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Question: Ferrell was born on July 16, 1967 in Irvine, California, to Betty Kay (née Overman; born 1940), a teacher who taught at Old Mill School elementary school and Santa Ana College and Roy Lee Ferrell Jr

Answer: July 16, 1967


Question: Christian Charles Philip Bale was born on 30 January 1974 in Haverfordwest, Pembrokeshire, to English parents—Jenny James, a circus performer, and David Bale, an entrepreneur and activist

Answer: 30 January 1974


Question: Emma Charlotte Duerre Watson was born on 15 April 1990 in Paris, to English lawyers Chris Watson and Jacqueline Luesby

Answer:
15 April 1990