( ( Because ( ( the skull ) ( is ( a ( rigid container ) ) ) ) ) ( , ( ( this swelling ) ( ( may ( cause ( ( increased pressure ) ( on ( the brain ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN Because) (S (NP (DT the) (NN skull)) (VP (VBZ is) (NP (DT a) (JJ rigid) (NN container))))) (, ,) (NP (DT this) (VBG swelling)) (VP (MD may) (VP (VB cause) (NP (NP (VBN increased) (NN pressure)) (PP (IN on) (NP (DT the) (NN brain)))))) (. .)))
Because the skull is a rigid container, this swelling may cause increased pressure on the brain.
(ROOT (S (S (VP (VBG Reducing) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NP (NNS molecules)) (PP (IN in) (NP (DT a) (JJ rigid) (NN container)))))))) (VP (VBZ causes) (NP (NN pressure)) (S (VP (TO to) (VP (VB decrease))))) (. .)))