Complex sentence: The church is not only used for religious services but is a hub for various other events, including choir shows, exhibitions and, during festivals and fayres, the church opens up to allow stalls and traders inside.
Split into simpler sentences: The church is not only used for religious services but is a hub for various other events. There are choir shows, exhibitions and, during festivals and fayres, the church opens up to allow stalls and traders inside.