( ( White ( blood cells ) ) ( ( are ( known ( as Leukocytes ) ) ) . ) )
(ROOT (S (NP (NNP White) (NN blood) (NNS cells)) (VP (VBP are) (VP (VBN known) (PP (IN as) (NP (NNP Leukocytes))))) (. .)))
White blood cells are known as Leukocytes.
(ROOT (S (NP (JJ Leukocytes) (NN blood) (NNS cells)) (VP (VBP are) (ADJP (JJ white))) (. .)))