Complex sentence: Since 1970 the Sailors have spent most of their time in the Niagara Junior C Hockey League but from 1975 until 1979, Port Colborne's Junior system went on hiatus when the town and the Sailors returned to Intermediate hockey.
Split into simpler sentences: Since 1970 the Sailors have spent most of their time in the Niagara Junior C Hockey League. From 1975 until 1979, Port Colborne's Junior system went on hiatus when the town and the Sailors returned to Intermediate hockey.