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'.

Example Input: Lange was born in Cloquet, Minnesota, on April 20, 1949
Example Output: April 20, 1949

Example Input: Rampling was born in 1946 in Sturmer, Essex, the daughter of Isabel Anne (née Gurteen; 1918–2001), a painter, and Godfrey Rampling (1909–2009), an Olympic gold medallist and British Army officer
Example Output: 1946

Example Input: Hayley Elizabeth Atwell was born on 5 April 1982 in London, an only child
Example Output:
5 April 1982

