( ( Although ( protists ( used ( to ( be ( thought ( of ( as ( one-celled ( ( animals or ) plants ) ) ) ) ) ) ) ) ) ) ( , ( they ( ( ( are often ) ( in ( between ( these ( ( more familiar ) types ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN Although) (S (NP (NNS protists)) (VP (VBD used) (S (VP (TO to) (VP (VB be) (VP (VBN thought) (PP (IN of) (PP (IN as) (NP (JJ one-celled) (NNS animals) (CC or) (NNS plants))))))))))) (, ,) (NP (PRP they)) (VP (VBP are) (ADVP (RB often)) (PP (IN in) (PP (IN between) (NP (DT these) (ADJP (RBR more) (JJ familiar)) (NNS types))))) (. .)))
Although protists used to be thought of as one-celled animals or plants, they are often in between these more familiar types.
(ROOT (S (NP (JJ Multiple) (NN fission)) (VP (VBZ is) (ADVP (RBR more) (RB often)) (VP (VBN observed) (PP (IN among) (NP (NNS protists))))) (. .)))