A subcollection of predicate describing actors in events. Each instance ROLE of agentive role must be an predicate describing actors in events that satisfies the following conditions: (i) ROLE specifies what an agent does (in the strict sense) in an event rather than describing what happens to the agent in the event. That is to say, (ROLE AGT EVENT), when true, must describe agency rather than a mere happening. Thus, each predicate describing actors in events that does not describe agency, such as affected object, victim, instrument, bodily doer, origin and path overlapping the path of motion etc., is not an instance of agentive role. (ii) ROLE must be specific enough to distinguish itself from other instances of agentive role. This means, roughly, that if SLOT is a generalization of both SLOT1 and SLOT2, where SLOT1 is different from SLOT2, then SLOT is not an instance of agentive role if both SLOT1 and SLOT2 are. Thus, interviewee is an instance of agentive role while social participant is not.