Tephra M4M Example	Semantic Web for Earth and Environment Technology Ontology	Source
https://example.com/tephra/vocs/m4m-tephra/subaerial	http://sweetontology.net/realm/Subaerial	LOOM
https://example.com/tephra/vocs/m4m-tephra/core	http://sweetontology.net/realmGeol/Core	LOOM
https://example.com/tephra/vocs/m4m-tephra/surface	http://sweetontology.net/reprSpaceGeometry/Surface	LOOM