CONCEPTShttp://cat.aii.caas.cn/concept/11351cat.aii.caas.cnhttp://linkeddata.ge.imati.cnr.it:2020/resource/EARTh/16040linkeddata.ge.imati.cnr.ithttp://lod.nal.usda.gov/nalt/6138lod.nal.usda.govhttp://www.eionet.europa.eu/gemet/concept/3159www.eionet.europa.eu。