( Chimpanzees ( , ( ( like humans ) ( , ( ( use ( ( facial expressions ) ( to ( convey emotions ) ) ) ) . ) ) ) ) )
(ROOT (S (NP (NNS Chimpanzees)) (, ,) (PP (IN like) (NP (NNS humans))) (, ,) (VP (VBP use) (S (NP (JJ facial) (NNS expressions)) (VP (TO to) (VP (VB convey) (NP (NNS emotions)))))) (. .)))
Chimpanzees, like humans, use facial expressions to convey emotions.
(ROOT (S (NP (JJ Human) (JJ facial) (NNS expressions)) (VP (MD can) (VP (VB communicate) (NP (NNS emotions)))) (. .)))