METPO	Plant Anatomy	Source
http://purl.obolibrary.org/obo/CL_0000151	http://purl.obolibrary.org/obo/PO_0004012	LOOM
http://purl.obolibrary.org/obo/NCBITaxon_1	http://purl.obolibrary.org/obo/PO_0009005	LOOM
https://w3id.org/metpo/0000221	http://purl.obolibrary.org/obo/PO_0009067	LOOM