A cat noticed that a cake was frozen by Liam .
cat ( x _ 1 ) AND notice . agent ( x _ 2 , x _ 1 ) AND notice . ccomp ( x _ 2 , x _ 7 ) AND cake ( x _ 5 ) AND freeze . theme ( x _ 7 , x _ 5 ) AND freeze . agent ( x _ 7 , Liam )