Complex sentence: From 1974 to 1996 the area now known as East Riding, North Lincolnshire and North East Lincolnshire constituted Humberside and for hundreds of years before that, the Humber lay between Lindsey and The East Riding of Yorkshire.
Split into simpler sentences: From 1974 to 1996 the areas now known as East Riding, North Lincolnshire and North East Lincolnshire constituted Humberside. For hundreds of years before that, the Humber lay between Lindsey and The East Riding of Yorkshire.