Complex sentence: Adelaide was divided into two districts with North Adelaide comprising of 342 acre blocks and (South) Adelaide of 700 blocks, surrounded by 2,300 acres set aside as parklands for recreation and public functions.
Split into simpler sentences: Adelaide was divided into two districts with North Adelaide comprising 342 acre blocks and (South) Adelaide with 700 blocks. Surrounding them were 2,300 acres to be set aside as parklands for recreation and public functions.