( ( ( ( ( The polyp ) ( is ( a ( ( sessile ( , ( or ( nonmotile , ) ) ) ) organism ) ) ) ) ; ) ( ( well-known ( solitary polyps ) ) ( are ( ( ( the ( sea anemone ) ) and ) ( the ( freshwater hydra ) ) ) ) ) ) . )
(ROOT (S (S (NP (DT The) (NN polyp)) (VP (VBZ is) (NP (DT a) (ADJP (JJ sessile) (, ,) (CC or) (JJ nonmotile) (, ,)) (NN organism)))) (: ;) (S (NP (JJ well-known) (JJ solitary) (NNS polyps)) (VP (VBP are) (NP (NP (DT the) (NN sea) (NN anemone)) (CC and) (NP (DT the) (NN freshwater) (NN hydra))))) (. .)))
The polyp is a sessile, or nonmotile, organism; well-known solitary polyps are the sea anemone and the freshwater hydra .
(ROOT (S (NP (NNS Hydras) (CC and) (NN sea) (NNS anemones)) (VP (VBP are) (NP (NP (NNS examples)) (PP (IN of) (NP (NN apolyp))))) (. .)))