> That language only has
> one mandatory operator (basically your +/- operator) and leaves the
> rest to the imagination of the listener, i.e., it is highly ambiguous.

> **Henrik

How about letting everything be implied by using adjectives to describe the
roles of the participants. A sentence might be: "John the giver, Marsha the
receiver, and a book." No action was stated, but an action was implied by the
stated roles.