manual digit
http://purl.obolibrary.org/obo/UBERON_0002389
http://purl.obolibrary.org/obo/UBERON_0012141
http://purl.obolibrary.org/obo/UBERON_5002389
UBERON:0002389
http://purl.obolibrary.org/obo/UBERON_0002544