Complex sentence: The School buildings have previously been used as a hospital, a camp for refugees in 1948, a Turkish military camp, and bombed twice by the Israeli Defense Force once in 1967 and once in 2001 during "Al-Aqsa Intifadah".
Split into simpler sentences: The School buildings have previously been used as a hospital, a camp for refugees (in 1948) and a Turkish military camp. The school was bombed twice by the Israeli Defense Force; once in 1967 and once in 2001 during "Al-Aqsa Intifadah".