Complex sentence: The island was part of a waterfront luxury development effort after 2008 connected to the construction of the Keppel Bay Bridge, and now houses high-end restaurants and a marina for yachts.
Split into simpler sentences: The island was part of a waterfront luxury development effort in 2008 and it was thereafter connected to the mainland via the construction of the Keppel Bay Bridge. Today, Keppel Island houses high-end restaurants and a marina for yachts.