Complex sentence: The Willamette Shore Trolley is a heritage railway trolley which travels along the west bank of the Willamette River between Portland and Lake Oswego in Oregon, on a train line known as the Jefferson Street Branch Line.
Split into simpler sentences: The Willamette Shore Trolley is a heritage railroad which operates along the west bank of the Willamette River between Portland and Lake Oswego in Oregon. The railroad offers passenger excursions using historic trolleys on a line known as the Jefferson Street Branch Line.