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'.

Sandler was born in Brooklyn, New York, on September 9, 1966, to Judith "Judy" (née Levine), a nursery school teacher, and Stanley Sandler, an electrical engineer
September 9, 1966

Gwyneth Kate Paltrow was born on September 27, 1972, in Los Angeles, to actress Blythe Danner and film producer-director Bruce Paltrow
September 27, 1972

George Hosato Takei was born Hosato Takei on April 20, 1937 in Los Angeles, California, to Japanese-American parents Fumiko Emily Nakamura (born in Sacramento, California) and Takekuma Norman Takei (born in Yamanashi Prefecture), who worked in real estate

April 20, 1937