Complex sentence: Aptheker was born in Fort Bragg, North Carolina to the first cousins Fay Philippa Aptheker and Herbert Aptheker, a radical activist and Marxist historian.
Split into simpler sentences: Aptheker was born in Fort Bragg, North Carolina to Fay Philippa Aptheker and Herbert Aptheker, who were first cousins. Her father became a radical activist and Marxist historian.