sentence1_binary_parse: ( You ( ( can ( ( ( use ( your ( own class ) ) ) ( plus ( ( ( seven ( other classes ) ) or ) ( ( two classes ) ( divided ( into ( ( four groups ) each ) ) ) ) ) ) ) ( -LRB- ( ( ( 8 groups ) ( in all ) ) -RRB- ) ) ) ) . ) )
sentence1_parse: (ROOT (S (NP (PRP You)) (VP (MD can) (VP (VB use) (NP (PRP$ your) (JJ own) (NN class)) (PP (CC plus) (NP (NP (CD seven) (JJ other) (NNS classes)) (CC or) (NP (NP (CD two) (NNS classes)) (VP (VBN divided) (PP (IN into) (NP (NP (CD four) (NNS groups)) (NP (DT each)))))))) (PRN (-LRB- -LRB-) (NP (NP (CD 8) (NNS groups)) (PP (IN in) (NP (DT all)))) (-RRB- -RRB-)))) (. .)))
sentence1: You can use your own class plus seven other classes or two classes divided into four groups  each (8 groups in all).
sentence2_parse: (ROOT (S (NP (NNS Mollusks)) (VP (MD can) (VP (VB be) (VP (VBN divided) (PP (IN into) (NP (CD seven) (NNS classes)))))) (. .)))
sentence2: Mollusks can be divided into seven classes.