( ( ( An example ) ( of ( a ( human ( polygenic trait ) ) ) ) ) ( ( is ( adult height ) ) . ) )
(ROOT (S (NP (NP (DT An) (NN example)) (PP (IN of) (NP (DT a) (JJ human) (JJ polygenic) (NN trait)))) (VP (VBZ is) (NP (JJ adult) (NN height))) (. .)))
An example of a human polygenic trait is adult height.
(ROOT (S (NP (JJ Adult) (NNS humans)) (VP (VBP lack) (NP (NP (DT some)) (PP (IN of) (NP (NP (DT the) (VBG defining) (NNS traits)) (PP (IN of) (NP (NNS chordates))))))) (. .)))