Relation pm#object_attitude_relation (sumo#cognitive_agent,sumo#physical)  intentional_relations where the agent has awareness of an instance of sumo#physical
  supertype:  pm#intentional_relation__intentionalrelation  relations between an agent and one or more entities, where the relation requires that the agent has awareness of the entity
  instance of:  pm#object_attitude_relation_type
  subtype:  sumo#needs__need (sumo#cognitive_agent,sumo#physical)  the 2nd argument is physically required for the continued existence of the cognitive agent
  subtype:  sumo#wants__want (sumo#cognitive_agent,sumo#physical)  the agent believes that the 2nd argument will satisfy one of its goals; what is wanted may or may not be already possessed by the agent