( ( The heat ) ( ( increased ( with ( the day ) ) ) . ) )
(ROOT (S (NP (DT The) (NN heat)) (VP (VBD increased) (PP (IN with) (NP (DT the) (NN day)))) (. .)))
The heat increased with the day.
(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)))))) (. .)))