( ( ( ( ( New ( molecular ( biology techniques ) ) ) , ) ( such ( as ( ( ( polymerase ( chain reaction ) ) , ) ( which ( permits ( ( the ( easy ( ( analysis and ) comparison ) ) ) ( of ( DNA structures ) ) ) ) ) ) ) ) ) , ) ( ( ( enabled ( American ( microbiologist ( Carl Woese ) ) ) ) ( to ( determine ( that ( ( ( a group ) ( of organisms ) ) ( formerly ( classified ( as ( bacteria ( actually ( belong ( to ( a ( separate taxon ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ New) (JJ molecular) (NN biology) (NNS techniques)) (, ,) (PP (JJ such) (IN as) (NP (NP (NN polymerase) (NN chain) (NN reaction)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ permits) (NP (NP (DT the) (JJ easy) (NN analysis) (CC and) (NN comparison)) (PP (IN of) (NP (NN DNA) (NNS structures))))))))) (, ,)) (VP (VBD enabled) (NP (JJ American) (NN microbiologist) (NNP Carl) (NNP Woese)) (S (VP (TO to) (VP (VB determine) (SBAR (IN that) (S (NP (NP (DT a) (NN group)) (PP (IN of) (NP (NNS organisms)))) (ADVP (RB formerly)) (VP (VBD classified) (SBAR (IN as) (S (NP (NNS bacteria)) (ADVP (RB actually)) (VP (VBP belong) (PP (TO to) (NP (DT a) (JJ separate) (NN taxon))))))))))))) (. .)))
New molecular biology techniques, such as polymerase chain reaction , which permits the easy analysis and comparison of DNA structures, enabled American microbiologist Carl Woese to determine that a group of organisms formerly classified as bacteria actually belong to a separate taxon.
(ROOT (S (NP (NNP Carl) (NNP woese)) (VP (VBN constructed) (NP (DT a) (NN tree) (NN diagram)) (, ,) (S (VP (VBG separating) (NP (VBG living) (NNS organisms)) (PP (IN into) (NP (CD three) (NNS domains)))))) (. .)))