which cover artist of the while mortals sleep also the source of inspiration of kurt vonnegut's god bless you ?
SELECT DISTINCT var_uri where brack_open dbr_While_Mortals_Sleep_ attr_open short_story_collection attr_close dbo_coverArtist var_uri sep_dot dbr_Kurt_Vonnegut's_God_Bless_You,_Mr._Rosewater dbo_basedOn var_uri brack_close