Complex sentence: In 1807, the first "Church of York" was built in Toronto out of wood and as a young structure, it was used in 1813, during the War of 1812 as a hospital.
Split into simpler sentences: In 1807, the first "church of York" was built in Toronto out of wood. As a young structure, it was used in 1813, during the War of 1812 as a hospital.