Complex sentence: In 2007, following a massive undertaking to secure funds for the construction, the school completed its new, copper-domed chapel, and Seton was placed into 4A Division II athletics by the Arizona Interscholastic Association.
Split into simpler sentences: In 2007, following a massive undertaking to secure funds for the construction, the school completed its new copper-domed chapel. Also in 2007, Seton was placed into 4A Division II athletics by the Arizona Interscholastic Association.