Complex sentence: Maria Avedici Santoya appears in the first "Omen" film of 1976 as well as it 2006 remake, as the biological mother of Damien Thorn.
Split into simpler sentences: Maria Avedici Santoya appears in the first "Omen" film of 1976 as well as the 2006 remake. She is the biological mother of Damien Thorn.