( ( The protists ) ( ( ( are often ) ( found ( ( ( on ( organic matter ) ) or ) ( in ( ( soils and ) caves ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS protists)) (VP (VBP are) (ADVP (RB often)) (VP (VBN found) (PP (PP (IN on) (NP (JJ organic) (NN matter))) (CC or) (PP (IN in) (NP (NNS soils) (CC and) (NNS caves)))))) (. .)))
The protists are often found on organic matter or in soils and caves.
(ROOT (S (NP (JJ Multiple) (NN fission)) (VP (VBZ is) (ADVP (RBR more) (RB often)) (VP (VBN observed) (PP (IN among) (NP (NNS protists))))) (. .)))