Complex sentence: Originally, forms were numbered from 1-5, after the introduction of Saint Sebastian house form names were changed and assigned a Patron Saint, e.g.7S would refer to Year 7, Saint Sebastian.
Split into simpler sentences: Originally, forms were numbered from 1-5. After the introduction of Saint Sebastian house form names were changed and assigned a Patron Saint, e.g.7S would refer to Year 7, Saint Sebastian.