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        <blockquote> The collection of sensory <a
            href="./perception-vocab.html#Perceiving">#$Perceivings</a>
            in which, by means of vibratory sensors, a <a
            href="./agent-vocab.html#PerceptualAgent">#$PerceptualAgent</a>
                <a href="./perception-vocab.html#hears">#$hears