Complex sentence: Denbighshire's total population at the United Kingdom Census 2001 was 93,065, which increased to 93,734 at the 2011 census, with the largest towns on the coast at Rhyl (2001 population c.25,000) and Prestatyn (2001 population c.18,000).
Split into simpler sentences: Denbighshire's total population at the United Kingdom Census 2001 was 93,065, which increased to 93,734 at the 2011 census. The largest towns on the coast are Rhyl (2001 population c.25,000) and Prestatyn (2001 population c.18,000).