( ( Group ( VIIA elements ) ) ( ( are ( -1 ( in ( binary compounds ) ) ) ) . ) )
(ROOT (S (NP (NNP Group) (NNP VIIA) (NNS elements)) (VP (VBP are) (NP (NP (CD -1)) (PP (IN in) (NP (JJ binary) (NNS compounds))))) (. .)))
Group VIIA elements are -1 in binary compounds.
(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))))) (. .)))