Complex sentence: Hollymount school is a large four floor building with a strong Catholic heritage, the school's former headmistress (Sister James) was one of the last of several nuns who taught at the school until the early 1990's.
Split into simpler sentences: Hollymount school is a large four floor building with a strong Catholic heritage. The school's former headmistress (Sister James) was one of the last of several nuns who taught at the school until the early 1990's.