( ( a compound ) ( ( is ( two elements ) ) together ) )
(ROOT (S (NP (DT a) (NN compound)) (VP (VBZ is) (NP (CD two) (NNS elements)) (ADVP (RB together)))))
a compound is two elements together
(ROOT (S (NP (DT A) (JJ binary) (JJ molecular) (NN compound)) (VP (VBZ is) (VP (VBN made) (PRT (RP up)) (PP (IN of) (NP (CD two) (NNS elements))))) (. .)))