0 5 0 http://purl.obolibrary.org/obo/ENVO_01000774 oligotrophic lake 'oligotrophic lake' SubClassOf 'lake' 'oligotrophic lake' SubClassOf http://purl.obolibrary.org/obo/RO_0002473 some 'oligotrophic water' http://purl.obolibrary.org/obo/ENVO_01000778 important site 'important site' SubClassOf 'environmental zone' 'important site' SubClassOf http://purl.obolibrary.org/obo/BFO_0000051 some 'environmental system' http://purl.obolibrary.org/obo/ENVO_01000777 nurdle 'nurdle' SubClassOf 'piece of plastic' http://purl.obolibrary.org/obo/ENVO_01000776 piece of plastic 'piece of plastic' SubClassOf http://purl.obolibrary.org/obo/RO_0002473 some 'plastic' 'piece of plastic' SubClassOf 'abiotic mesoscopic physical object' http://purl.obolibrary.org/obo/ENVO_01000775 mesotrophic lake 'mesotrophic lake' SubClassOf http://purl.obolibrary.org/obo/RO_0002473 some 'mesotrophic water' 'mesotrophic lake' SubClassOf 'lake'