( ( ( ( ( ( A protist ) ( is ( classified ( by ( being ( either ( a ( single-celled eukaryote ) ) ) ) ) ) ) ) , ) or ) ( ( in ( the case ) ) ( it ( is multicellular ) ) ) ) ( , ( it ( ( ( does not ) ( have ( ( specialized tissues ) ( in ( the organism ) ) ) ) ) . ) ) ) )
(ROOT (S (S (S (NP (DT A) (NN protist)) (VP (VBZ is) (ADJP (VBN classified) (PP (IN by) (S (VP (VBG being) (NP (RB either) (DT a) (JJ single-celled) (NN eukaryote)))))))) (, ,) (CC or) (S (PP (IN in) (NP (DT the) (NN case))) (NP (PRP it)) (VP (VBZ is) (ADJP (JJ multicellular))))) (, ,) (NP (PRP it)) (VP (VBZ does) (RB not) (VP (VB have) (NP (NP (VBN specialized) (NNS tissues)) (PP (IN in) (NP (DT the) (NN organism)))))) (. .)))
A protist is classified by being either a single-celled eukaryote, or in the case it is multicellular, it does not have specialized tissues in the organism.
(ROOT (S (S (NP (JJ Single-celled) (NNS organisms) (CC and) (NN multicellular) (NNS organisms)) (VP (VBP have) (NP (NP (DT this)) (PP (IN in) (NP (JJ common)))))) (: :) (S (NP (DT both)) (VP (VBP have) (NP (DT a) (NN way) (S (VP (TO to) (VP (VB get) (ADJP (JJ rid)) (PP (IN of) (NP (NN waste) (NNS materials))))))))) (. .)))