Lisa the Vegetarian
... that Paul McCartney's condition for guest starring in The Simpsons episode "Lisa the Vegetarian" was that Lisa, who becomes a vegetarian in the episode, remain one for the rest of the series?
... that <a href="./Paul_McCartney" id="mwGFc" rel="mw:WikiLink" title="Paul McCartney">Paul McCartney</a>'s condition for guest starring in <i id="mwGFg"><a href="./The_Simpsons" id="mwGFk" rel="mw:WikiLink" title="The Simpsons">The Simpsons</a></i> episode "<b id="mwGFo"><a href="./Lisa_the_Vegetarian" id="mwGFs" rel="mw:WikiLink" title="Lisa the Vegetarian">Lisa the Vegetarian</a></b>" was that <a href="./Lisa_Simpson" id="mwGFw" rel="mw:WikiLink" title="Lisa Simpson">Lisa</a>, who becomes a <a class="mw-redirect" href="./Vegetarian" id="mwGF0" rel="mw:WikiLink" title="Vegetarian">vegetarian</a> in the episode, remain one for the rest of the series?