( Leukocytes ( ( are ( white ( blood cells ) ) ) . ) )
(ROOT (S (NP (NNS Leukocytes)) (VP (VBP are) (NP (JJ white) (NN blood) (NNS cells))) (. .)))
Leukocytes are white blood cells.
(ROOT (S (NP (JJ Leukocytes) (NN blood) (NNS cells)) (VP (VBP are) (ADJP (JJ white))) (. .)))