Complex sentence: Diamond Creek's shopping centres have largely developed over the years, a Tuckerbag was built as the first shopping centre (later Foodworks) that supermarket is now a Ritchies Stores Supa IGA.
Split into simpler sentences: Diamond Creek's shopping centres have developed over the years. A Tuckerbag was built as the first shopping centre (later Foodworks); that supermarket later became a Ritchies Stores Supa IGA.