( Bacteria ( ( are ( ( Eukaryotes ( Prokaryotes ( Protists ( Amphibians Insects ) ) ) ) 2 ) ) . ) )
(ROOT (S (NP (NNS Bacteria)) (VP (VBP are) (NP (NP (NNPS Eukaryotes) (NNPS Prokaryotes) (NNP Protists) (NNPS Amphibians) (NNP Insects)) (NP (CD 2)))) (. .)))
Bacteria are Eukaryotes Prokaryotes Protists Amphibians Insects 2.
(ROOT (S (NP (NNS Protists)) (VP (VBP are) (VP (VBN thought) (S (VP (TO to) (VP (VB be) (NP (DT the) (JJS oldest) (NNS eukaryotes))))))) (. .)))