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