( ( ( Increasing ( day length ) ) ( on Earth ) ) . )
(ROOT (NP (NP (VBG Increasing) (NN day) (NN length)) (PP (IN on) (NP (NNP Earth))) (. .)))
Increasing day length on Earth.
(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)))))) (. .)))