_:genid1 . _:genid2 ""^^ . "cccdc5c3-fd3f-4dfb-90ff-b34b6174aca8" . "Principal U.S. Groundwater Aquifers and Use - Bottom"^^ . "2013-11-19T20:15:00"^^ . . _:genid1 . _:genid2 . . .