Complex sentence: It has a total of three divisions, of which the highest, the Basingstoke League Premier Division, is a feeder to the North Hants League and sits at level 14 of the English football league system.
Split into simpler sentences: It has a total of three divisions, including the Basingstoke League Premier Division. It is a feeder to the North Hants League and sits at level 14 of the English football league system.