Complex sentence: The buildings were destroyed by the Philippine Commonwealth forces against the Japanese in 1945 and the school reopened in a temporary structure of Nipa and sawali erected in the patio of the pre-war compound.
Split into simpler sentences: The buildings were destroyed during the fighting between the Philippine Commonwealth forces and the Japanese in 1945. The school reopened in temporary structures of nipa and sawali erected in the patio of the pre-war compound.