Tephra M4M Example	Systematized Nomenclature of Medicine, International Version	Source
http://purl.bioontology.org/ontology/SNMI/G-A168	https://example.com/tephra/vocs/m4m-tephra/surface	LOOM
http://purl.bioontology.org/ontology/SNMI/G-A447	https://example.com/tephra/vocs/m4m-tephra/natural	LOOM