{"gt_parse": {"text_sequence": "ain smalle r penins ulas s uch as th e Kewe enaw Pen insula the Thu mb Peni nsula the Bruce Peninsula and the Niagara Peninsula. Population centers on the peninsulas includ e Grand Rapids Flint and Detroit i n Michigan along with London Hamilto n Brantford and Toronto in Ontario.Shippin g connection to the ocean.Although the Saint Lawrence Seaw ay and Great Lakes Waterway make the Great Lak es accessible to ocean-going vessels shifts in shippi ng to wider ocean-going container ships—whi ch do not fit through the locks on these rout es—have li mited contai ner s hipping on the lakes."}}