Complex sentence: By the middle of the 1930's a new school building was being built at Janetta street, in the north of clydebank, during the war the building was hit by a Parachute mine but was still able to operate as a temporary first aid post.
Split into simpler sentences: By the middle of the 1930's a new school building was being built at Janetta Street, in the north of Clydebank. During the war the building was hit by a parachute mine but was still usable as a temporary first aid post.