Relation INSTRUMENT-OF

In case it is the agent that explicitly uses something, the range should include *agent as well; on the other hand, an agent always uses something to perform some process, then there actually are two axioms: *agent-(performs)->action<-(instrument-of)- something. When it is said that an agent 'generically' uses something, an implied process must be inserted anyway, eg: smith-(performs)- >action<-(instrument-of)-hammer. Another possibility: a 'uses' relation which encapsulates: (performs)->action<-(instrument-of); see 'uses' for such a composed relation.
Arity: 2
Range: Act
Subrelation-Of: By-actor-of