Complex sentence: The cathedral was started in 1077 by Paul de Caen, the 14th Abbot, it was completed in 1089 and was 350 feet long with a tower and seven apses.
Split into simpler sentences: The cathedral was started in 1077 by Paul de Caen, the 14th Abbot and completed in 1089. It was 350 feet long with a tower and seven apses.