Complex sentence: Pennant Hills was used in naming the location of St Paul's Church built on Mobbs Hill in 1850 and the associated Denominational School, which occupied a purpose built premises next to the church from 1872 (demolished in the 1970s).
Split into simpler sentences: Pennant Hills was used in naming the location of St Paul's Church built on Mobbs Hill in 1850 and the associated denominational school which commenced around the same time. The school occupied purpose built premises next to the church from 1872 (demolished in the 1970s).