Chromatin Regulator Ontology	Variation Ontology	Source
http://purl.obolibrary.org/obo/GO_1990904	http://purl.obolibrary.org/obo/VariO_0268	LOOM
http://purl.obolibrary.org/obo/GO_0016570	http://purl.obolibrary.org/obo/VariO_0453	LOOM
http://purl.obolibrary.org/obo/GO_0032993	http://purl.obolibrary.org/obo/VariO_0270	LOOM