( Leukocytes ( -LRB- ( ( White ( Blood Cells ) ) -RRB- ) ) )
(ROOT (NP (NP (NNS Leukocytes)) (PRN (-LRB- -LRB-) (NP (NNP White) (NNP Blood) (NNP Cells)) (-RRB- -RRB-))))
Leukocytes (White Blood Cells)
(ROOT (S (NP (JJ Leukocytes) (NN blood) (NNS cells)) (VP (VBP are) (ADJP (JJ white))) (. .)))