( Humans ( ( have ( ( 23 pairs ) ( of ( chromosomes ( in ( their bodies ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Humans)) (VP (VBP have) (NP (NP (CD 23) (NNS pairs)) (PP (IN of) (NP (NP (NNS chromosomes)) (PP (IN in) (NP (PRP$ their) (NNS bodies))))))) (. .)))
Humans have 23 pairs of chromosomes in their bodies.
(ROOT (S (NP (NNS Humans)) (VP (VBP have) (NP (NP (CD 23) (JJ pairs) (NNS pairs)) (PP (IN of) (NP (NNS chromosomes))))) (. .)))