Olivia said that a duck said that a cake was shortened .
say . agent ( x _ 1 , Olivia ) AND say . ccomp ( x _ 1 , x _ 5 ) AND duck ( x _ 4 ) AND say . agent ( x _ 5 , x _ 4 ) AND say . ccomp ( x _ 5 , x _ 10 ) AND cake ( x _ 8 ) AND shorten . theme ( x _ 10 , x _ 8 )