performer</i></a></font>
        <blockquote> A specialization of <a
            href="./doing-vocab.html#Action">#$Action.</a> Each instance
            of <a
            href="./doing-vocab.html#SingleDoerAction">#$SingleDoerAction</a>
            is an action which can have only one doer (see the predicate
                <a href="./actor-vocab.html#doneBy">#$doneBy).</a> Such
            actions may be intentional, but they need not be. Most
            bodily functions (e.g., the instances of #$Heartbe