<p>DALLAS, Texas (AP) -- With her sparkling blue eyes, wispy eyelashes and demure smile, Hertz is the center of attention wherever she goes.</p>
<p>If you're lucky enough to meet her, try to ignore the tangle of wires slinking from behind her face. If you speak with her, talk slowly and loudly. And no matter what you say, don't be offended if she looks at you blankly and repeatedly asks, "What did you say?"</p>