( ( ( ( ( Sea lettuce ) ( belongs ( to ( ( ( ( the ( green ( algae group ) ) ) ( -LRB- ( ( Phylum Chlorophyta ) -RRB- ) ) ) , ) ( ( most ( of which ) ) ( are ( freshwater species ) ) ) ) ) ) ) ; ) ( ( ( only ( about ten ) ) percent ) ( live ( in ( the ocean ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Sea) (NNP lettuce)) (VP (VBZ belongs) (PP (TO to) (NP (NP (NP (DT the) (JJ green) (NN algae) (NN group)) (PRN (-LRB- -LRB-) (NP (NNP Phylum) (NNP Chlorophyta)) (-RRB- -RRB-))) (, ,) (SBAR (WHNP (JJS most) (WHPP (IN of) (WHNP (WDT which)))) (S (VP (VBP are) (NP (NN freshwater) (NNS species))))))))) (: ;) (S (NP (QP (RB only) (RB about) (CD ten)) (NN percent)) (VP (VBP live) (PP (IN in) (NP (DT the) (NN ocean))))) (. .)))
Sea lettuce belongs to the green algae group (Phylum Chlorophyta), most of which are freshwater species; only about ten percent live in the ocean.
(ROOT (S (NP (RBS Most) (JJ red) (NN algae) (NNS species)) (VP (VBP live) (PP (IN in) (NP (NNS oceans)))) (. .)))