determining, based on the metagraph, {HEAD ~ a type} for a node of {TAIL ~ the given pair} of connected nodes 
of
determining , based on the metagraph , { HEAD ~ a type } for a node of { TAIL ~ the given pair } of connected nodes
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH