Bobby Gregg
... that Simon & Garfunkel did not know that Bobby Gregg was the drummer on their #1 single "The Sounds of Silence"?
... that <a href="./Simon_&amp;_Garfunkel" id="mwBb8" rel="mw:WikiLink" title="Simon &amp; Garfunkel">Simon &amp; Garfunkel</a> did not know that <b id="mwBcA"><a href="./Bobby_Gregg" id="mwBcE" rel="mw:WikiLink" title="Bobby Gregg">Bobby Gregg</a></b> was the <a href="./Drummer" id="mwBcI" rel="mw:WikiLink" title="Drummer">drummer</a> on their #1 single "<a class="mw-redirect" href="./The_Sounds_of_Silence" id="mwBcM" rel="mw:WikiLink" title="The Sounds of Silence">The Sounds of Silence</a>"?