Complex sentence: Whittaker Chambers was born in Philadelphia, Pennsylvania and spent his infancy in Brooklyn, before his family moved to Lynbrook on Long Island, New York, in 1904, where he grew up and attended school.
Split into simpler sentences: Whittaker Chambers was born in Philadelphia, Pennsylvania and spent his infancy in Brooklyn. His family moved to Lynbrook on Long Island, New York in 1904, where he grew up and attended school.