Complex sentence: Four of the crosses are in the churchyard of St Columba's church, the other, a large Celtic cross that was positioned in the middle of a busy crossroads, until an unfortunate accident involving a cumbersome school bus.
Split into simpler sentences: Four of the crosses are in the churchyard of St Columba's church. The other Celtic cross was positioned in the middle of a busy crossroads until an unfortunate accident involving a cumbersome school bus.