The Ecosystem Ontology	CIDOC Conceptual Reference Model	Source
http://www.cidoc-crm.org/cidoc-crm/E50_Date	http://purl.dataone.org/odo/ECSO_00002051	LOOM
http://www.cidoc-crm.org/cidoc-crm/E74_Group	http://purl.dataone.org/odo/ECSO_00000526	LOOM