( This ( ( ( ( means ( ( ( the ( gas pressure ) ) ( inside ( the container ) ) ) ( will increase ) ) ) , ) ( since ( ( the volume ) ( is constant ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ means) (SBAR (S (NP (NP (DT the) (NN gas) (NN pressure)) (PP (IN inside) (NP (DT the) (NN container)))) (VP (MD will) (VP (VB increase))))) (, ,) (SBAR (IN since) (S (NP (DT the) (NN volume)) (VP (VBZ is) (ADJP (JJ constant)))))) (. .)))
This means the gas pressure inside the container will increase, since the volume is constant.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NP (NN temperature) (NNS increases)) (PP (CC but) (NP (NP (NN amount)) (PP (IN of) (NP (NP (NN gas)) (CC and) (NP (PRP$ its) (NN pressure))))))) (VP (VBP are) (ADJP (JJ constantvolume))))) (NP (NNS increases)) (VP (VBZ happens) (PP (TO to) (NP (NP (DT the) (NN volume)) (PP (IN of) (NP (DT the) (NN gas)))))) (. .)))