( Cells ( ( are ( ( the ( building blocks ) ) ( of life ) ) ) . ) )
(ROOT (S (NP (NNS Cells)) (VP (VBP are) (NP (NP (DT the) (VBG building) (NNS blocks)) (PP (IN of) (NP (NN life))))) (. .)))
Cells are the building blocks of life.
(ROOT (S (NP (NNS Cells)) (VP (VBP are) (NP (NP (DT the) (VBN specialized) (NN building) (NNS blocks)) (PP (IN of) (NP (PRP$ your) (NN body))))) (. .)))