( ( The ( scarcest ( nonrenewable resource ) ) ) ( ( is time ) . ) )
(ROOT (S (NP (DT The) (JJ scarcest) (NN nonrenewable) (NN resource)) (VP (VBZ is) (NP (NN time))) (. .)))
The scarcest nonrenewable resource is time.
(ROOT (S (NP (NP (NNP Soil)) (, ,) (PP (IN for) (NP (JJ human) (NNS purposes))) (, ,)) (VP (VBZ is) (S (NP (DT a) (-LRB- -LRB-) (NN n) (-RRB- -RRB-)) (VP (VB nonrenewable) (NP (NN resource))))) (. .)))