Complex sentence: Some musical clocks play a tune each hour where as others are known to play every 3 to 4 hours this is seen by many to be an idea originated to do with Roman and Angelus times.
Split into simpler sentences: Some musical clocks play a tune each hour where as others are known to play every 3 to 4 hours. This is seen by many to be an idea originated to do with Roman and Angelus times.