CONCEPTShttp://linkeddata.ge.imati.cnr.it:2020/resource/EARTh/99230linkeddata.ge.imati.cnr.ithttp://lod.nal.usda.gov/nalt/8468lod.nal.usda.govhttp://www.eionet.europa.eu/gemet/concept/402www.eionet.europa.eu。