Complex sentence: By the 1990s, however, the South Shore became a major vacation destination and as other popular centres such as Mahone Bay and Chester became crowded and very expensive travellers turned to smaller locations like Kingsburg.
Split into simpler sentences: By the 1990s, however, the South Shore had become a major vacation destination. As other popular destinations such as Mahone Bay and Chester became crowded and very expensive, travellers turned to smaller locations like Kingsburg.