( ( With ( ( the ( increased heat ) ) ( of summer ) ) ) ( , ( ( ( insects and ) fish ) ( ( are ( ( most active ) ( during ( ( the ( cooler parts ) ) ( of ( the day ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN With) (NP (NP (DT the) (VBN increased) (NN heat)) (PP (IN of) (NP (NN summer))))) (, ,) (NP (NNS insects) (CC and) (NN fish)) (VP (VBP are) (ADJP (ADJP (RBS most) (JJ active)) (PP (IN during) (NP (NP (DT the) (JJR cooler) (NNS parts)) (PP (IN of) (NP (DT the) (NN day))))))) (. .)))
With the increased heat of summer, insects and fish are most active during the cooler parts of 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)))))) (. .)))