Chemical Information Ontology	Clinical Trials Gov Ontology	Source
http://clinicaltrials.gov/ctgo#Document	http://purl.obolibrary.org/obo/IAO_0000310	LOOM
http://clinicaltrials.gov/ctgo#Site	http://purl.obolibrary.org/obo/BFO_0000029	LOOM
http://clinicaltrials.gov/ctgo#Device	http://purl.obolibrary.org/obo/OBI_0400002	LOOM