( They ( ( are ( ( ( diploid cells ) , ) ( containing ( ( 23 pairs ) ( of ( chromosomes ( for ( ( a total ) ( of ( 46 chromosomes ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP are) (VP (VBN diploid) (NP (NNS cells)) (, ,) (S (VP (VBG containing) (NP (NP (CD 23) (NNS pairs)) (PP (IN of) (NP (NP (NNS chromosomes)) (PP (IN for) (NP (NP (DT a) (NN total)) (PP (IN of) (NP (CD 46) (NNS chromosomes)))))))))))) (. .)))
They are diploid cells, containing 23 pairs of chromosomes for a total of 46 chromosomes.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD 46) (NNS chromosomes) (NNS chromosomes)) (PP (IN in) (NP (DT a) (JJ diploid) (JJ human) (NN cell))))) (. .)))