Complex sentence: Catherine de Hueck Doherty was a Russian émigré who escaped during the Bolshevik Revolution and later became a convert to Roman Catholicism and founder of Madonna House, a lay apostolate based in Combermere Canada.
Split into simpler sentences: Catherine de Hueck Doherty was a Russian émigré who escaped during the Bolshevik Revolution. She later became a convert to Roman Catholicism and founder of Madonna House, a lay apostolate based in Combermere Canada.