( ( This clade ) ( ( is ( called ( the Cetartiodactyla ) ) ) . ) )
(ROOT (S (NP (DT This) (NN clade)) (VP (VBZ is) (VP (VBN called) (NP (DT the) (NNP Cetartiodactyla)))) (. .)))
This clade is called the Cetartiodactyla.
(ROOT (S (NP (DT A) (NN clade)) (VP (VBZ is) (NP (NP (CD one) (NN way)) (PP (IN of) (NP (VBG classifying) (NNS organisms))))) (. .)))