Complex sentence: His father was Manlio Zileri Larco Aurelio, and his mother Doris Gibson, who cofounded the newsmagazine "Caretas" with Francisco Igartua in October 1950.
Split into simpler sentences: His father was Manlio Zileri Larco Aurelio. His mother, Doris Gibson, cofounded the newsmagazine "Caretas" with Francisco Igartua in October 1950.