had such a strong rapport on screen
... that Maureen O'Hara and John Wayne had such a strong rapport on screen that some people believed that they were married in real life?
... that <a href="./Maureen_O'Hara" id="mwB88" rel="mw:WikiLink" title="Maureen O'Hara">Maureen O'Hara</a> and <a href="./John_Wayne" id="mwB9A" rel="mw:WikiLink" title="John Wayne">John Wayne</a> <i id="mwB9E">(both pictured)</i> <b id="mwB9I"><a href="./Maureen_O'Hara_filmography" id="mwB9M" rel="mw:WikiLink" title="Maureen O'Hara filmography">had such a strong rapport on screen</a></b> that some people believed that they were married in real life?