Complex sentence: During the First World War part of Port Meadow was used to train the Royal Flying Corps and turned into a military aerodrome.15 air crew and pilots were killed either flying from Port Meadow or close by.
Split into simpler sentences: During the First World War part of Port Meadow was used to train the Royal Flying Corps and turned into a military aerodrome. Fifteen air crew and pilots were killed flying from Port Meadow or close by.