Ethelyn Gibson
... that actress Ethelyn Gibson was the first person to star in and produce a serial film that had sound?
... that actress <b id="mwBrM"><a href="./Ethelyn_Gibson" id="mwBrQ" rel="mw:WikiLink" title="Ethelyn Gibson">Ethelyn Gibson</a></b> was the first person to star in and produce a <a href="./Serial_film" id="mwBrU" rel="mw:WikiLink" title="Serial film">serial film</a> that had sound?