( ( ( A ( long scar ) ) ( of ( railroad tracks ) ) ) ( ( ( stretched down ) ( ( the length ) ( of ( ( Tim ( Campbell 's ) ) chest ) ) ) ) . ) )
(ROOT (S (NP (NP (DT A) (JJ long) (NN scar)) (PP (IN of) (NP (NN railroad) (NNS tracks)))) (VP (VBD stretched) (PRT (RP down)) (NP (NP (DT the) (NN length)) (PP (IN of) (NP (NP (NNP Tim) (NNP Campbell) (POS 's)) (NN chest))))) (. .)))
A long scar of railroad tracks stretched down the length of Tim Campbell's chest.
(ROOT (S (NP (NP (DT A) (-LRB- -LRB-) (NN n) (-RRB- -RRB-) (NN increase)) (PP (IN in) (NP (NN length)))) (VP (VBZ happens) (PP (TO to) (NP (NN metal) (NN railroad) (NNS tracks))) (PP (IN during) (NP (NP (DT the) (NN heat)) (PP (IN of) (NP (DT a) (NN summer) (NN day)))))) (. .)))