Complex sentence: However, the removal of this status in the 1970s prompted the governors to decide on three courses of action: to discontinue boarding, to admit girls for the first time and to build a new Preparatory Department.
Split into simpler sentences: However, the removal of this status in the 1970s prompted the Governors to decide on three courses of action. These were to discontinue boarding, to admit girls for the first time and to build a new Preparatory Department.