guest appearance
...that Eric Clapton's guest appearance playing lead guitar on "While My Guitar Gently Weeps" was uncredited?
...that <a href="./Eric_Clapton" id="mwDh8" rel="mw:WikiLink" title="Eric Clapton">Eric Clapton</a>'s <b id="mwDiA"><a href="./Guest_appearance" id="mwDiE" rel="mw:WikiLink" title="Guest appearance">guest appearance</a></b> playing <a href="./Lead_guitar" id="mwDiI" rel="mw:WikiLink" title="Lead guitar">lead guitar</a> on "<a href="./While_My_Guitar_Gently_Weeps" id="mwDiM" rel="mw:WikiLink" title="While My Guitar Gently Weeps">While My Guitar Gently Weeps</a>" was uncredited?