Complex sentence: Knickerbocker was married first to Laura Patrick in 1918, and they had one son, Conrad, later a daily book reviewer for the New York Times; his second marriage was to Agnes Schjoldager, and they had three daughters.
Split into simpler sentences: Knickerbocker was married first to Laura Patrick in 1918, and they had one son, Conrad, later a daily book reviewer for the New York Times. His second marriage was to Agnes Schjoldager, and they had three daughters.