( ( d -RRB- ) ( ( Decreasing ( the volume ) ) ( ( increases ( ( the pressure ) ( of ( the ( gas-phase species ) ) ) ) ) . ) ) )
(ROOT (S (LST (LS d) (-RRB- -RRB-)) (NP (JJ Decreasing) (DT the) (NN volume)) (VP (VBZ increases) (NP (NP (DT the) (NN pressure)) (PP (IN of) (NP (DT the) (JJ gas-phase) (NN species))))) (. .)))
d) Decreasing the volume increases the pressure of the gas-phase species.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NN gas) (NNS particles)) (VP (VB heat) (PRT (RP up))))) (, ,) (NP (NN pressure)) (VP (VBP increase)) (. .)))