( ( ( increasing ( numbers ( of deaths ) ) ) ( during ( summer ( heat waves ) ) ) ) ; )
(ROOT (S (VP (VBG increasing) (NP (NP (NNS numbers)) (PP (IN of) (NP (NNS deaths)))) (PP (IN during) (NP (NN summer) (NN heat) (NNS waves)))) (: ;)))
increasing numbers of deaths during summer heat waves;
(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)))))) (. .)))