a 1962 film
... that Jean-Paul Sartre did not know that his existentialist play No Exit was adapted to a 1962 film, which featured "surprisingly overt" lesbianism?
... that <a href="./Jean-Paul_Sartre" id="mwSQ" rel="mw:WikiLink" title="Jean-Paul Sartre">Jean-Paul Sartre</a> did not know that his existentialist play <i id="mwSg"><a href="./No_Exit" id="mwSw" rel="mw:WikiLink" title="No Exit">No Exit</a></i> was adapted to <b id="mwTA"><a href="./No_Exit_(1962_film)" id="mwTQ" rel="mw:WikiLink" title="No Exit (1962 film)">a 1962 film</a></b>, which featured "surprisingly overt" lesbianism?