(anatomical part involved ACT PART) means that PART is one of the parts (see the predicate anatomical part) of an organism that is playing an active role (see the predicate doer and its specializations) in the event ACT, and, moreover, that PART is somehow involved in the event ACT. Some examples of anatomical part involved include: the eyes of someone who is sneezing (or crying); the left foot of someone playing in a football game; the right hand of someone who is shaking hands; the claws of a cat who is scratching someone. As a negative example, consider a person's hair when that person is getting a haircut. The hair is not an anatomical part involved, because the person is passive in that event; it is, however, an Actor Parts Affected (q.v.) in that event.