( Studies ( ( show ( that ( they ( ( are ( most frequently ) ) ( ( ( encountered ( among ( the ( Pseudomonas ( and ( Bacterium species ) ) ) ) ) ) and ) ( also ( among myxobacteria ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNPS Studies)) (VP (VBP show) (SBAR (IN that) (S (NP (PRP they)) (VP (VBP are) (ADVP (RBS most) (RB frequently)) (VP (VP (VBN encountered) (PP (IN among) (NP (DT the) (NNPS Pseudomonas) (CC and) (NNP Bacterium) (NNP species)))) (CC and) (VP (ADVP (RB also)) (PP (IN among) (NP (NN myxobacteria))))))))) (. .)))
Studies show that they are most frequently encountered among the Pseudomonas and Bacterium species and also among myxobacteria.
(ROOT (S (NP (NNS Bacteria)) (VP (VBP are) (NP (NP (DT the) (RBS most) (JJ numerous) (NNS species)) (PP (IN on) (NP (DT the) (NN planet))))) (. .)))