( ( ( ( Increasing ( metal/alloy superheat ) ) or ) ( reducing ( heat losses ) ) ) ( ( increase fluidity ) . ) )
(ROOT (S (S (VP (VP (VBG Increasing) (ADJP (RB metal/alloy) (JJ superheat))) (CC or) (VP (VBG reducing) (NP (NN heat) (NNS losses))))) (VP (VBP increase) (ADVP (RB fluidity))) (. .)))
Increasing metal/alloy superheat or reducing heat losses increase fluidity.
(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)))))) (. .)))