( ( Red ( blood cell ) ) ( casts . ) )
(ROOT (S (NP (JJ Red) (NN blood) (NN cell)) (VP (VBZ casts)) (. .)))
Red blood cell casts.
(ROOT (S (NP (NNP Red) (NN blood) (NNS cells)) (VP (VBP are) (NP (DT the) (RBS most) (JJ numerous) (NN blood) (NNS cells))) (. .)))