( ( ( The ( important idea ) ) ( being ( communicated ( by ( facial expression ) ) ) ) ) ( ( ( ( is emotion ) , ) ( but ( ( the ( facial expression ) ) ( ( is not ) ( ( the ( same thing ) ) ( as ( the emotion ) ) ) ) ) ) ) ; ) )
(ROOT (S (NP (NP (DT The) (JJ important) (NN idea)) (VP (VBG being) (VP (VBN communicated) (PP (IN by) (NP (JJ facial) (NN expression)))))) (VP (VBZ is) (NP (NN emotion)) (, ,) (SBAR (CC but) (S (NP (DT the) (JJ facial) (NN expression)) (VP (VBZ is) (RB not) (NP (NP (DT the) (JJ same) (NN thing)) (PP (IN as) (NP (DT the) (NN emotion)))))))) (: ;)))
The important idea being communicated by facial expression is emotion, but the facial expression is not the same thing as the emotion;
(ROOT (S (NP (JJ Human) (JJ facial) (NNS expressions)) (VP (MD can) (VP (VB communicate) (NP (NNS emotions)))) (. .)))