Complex sentence: Buffalo City Tower as approved is a 40-story, mixed-use, tower aiming to be the tallest in downtown Buffalo, being developed by British property development company BSC Group, headed up by entrepreneur Bashar Issa.
Split into simpler sentences: Buffalo City Tower was an approved 40-story, mixed-use, tower aiming to be the tallest in downtown Buffalo. It was to be developed by British property development company BSC Group, headed up by entrepreneur Bashar Issa.