Complex sentence: The area has been undergoing significant urban renewal since the late 1990s, including removal of a viaduct and construction of the Portland Streetcar, and is now full of high-rise condominiums and warehouse-to-loft conversions.
Split into simpler sentences: The area has been undergoing significant urban renewal since the late 1990s, including the removal of a viaduct and construction of the Portland Streetcar. It is now mostly comprised of high-rise condominiums and warehouse-to-loft conversions.