Complex sentence: Subsequent to his return from the Netherlands, Livingston served as a pastor to the Reformed Church in New York City, becoming a leading figure in the church and negotiating the peaceful reunifications of its two opposing factions.
Split into simpler sentences: Subsequent to his return from the Netherlands, Livingston served as a pastor to the Reformed Church in New York City. He became a leading figure in the church and negotiated the peaceful reunifications of its two opposing factions.