_:genid1 "2 hours"^^ . _:genid2 . _:genid2 . _:genid2 "Unknown"^^ . _:genid3 . _:genid3 "Data were downloaded and plotted via Microsoft Excel"^^ . _:genid4 . _:genid4 _:genid2 . _:genid4 _:genid3 . "8f0eba22-nca3-epica-ice-core-r20080515-process" . "Data were downloaded and plotted via Microsoft Excel"^^ . _:genid1 . "Unknown"^^ . "Unknown"^^ . _:genid4 . . . .