Complex sentence: The Corporation sought the need to build a department store and this was completed in 1975 as phase 3, they built the store for Woolworths with 2 Levels of Underground Parking later this Store was sold to ASDA.
Split into simpler sentences: The Corporation sought the building of a department store and this was completed in 1975 as phase 3. The store was built for Woolworths with 2 Levels of underground parking, later this store was sold to ASDA.