( ( ( About ( 1.5 million ) ) Canadians ) ( ( suffer ( from ( ( asthma , ) ( ( a ( chronic ( , ( inflammatory ( lung disease ) ) ) ) ) ( ( in which ) ( ( ( the ( air passages ) ) ( in ( ( the lungs ) ( ( narrow and ) breathing ) ) ) ) ( becomes difficult ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (QP (RB About) (CD 1.5) (CD million)) (NNPS Canadians)) (VP (VBP suffer) (PP (IN from) (NP (NP (NN asthma)) (, ,) (NP (NP (DT a) (JJ chronic) (, ,) (JJ inflammatory) (NN lung) (NN disease)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (NP (DT the) (NN air) (NNS passages)) (PP (IN in) (NP (NP (DT the) (NNS lungs)) (ADJP (JJ narrow) (CC and) (JJ breathing))))) (VP (VBZ becomes) (ADJP (JJ difficult))))))))) (. .)))
About 1.5 million Canadians suffer from asthma, a chronic, inflammatory lung disease in which the air passages in the lungs narrow and breathing becomes difficult.
(ROOT (S (NP (NNP Narrow) (NN air) (NNS passages)) (VP (VBP make) (S (VP (VBG breathing) (ADJP (JJ difficult) (RB due) (S (VP (TO to) (VP (VB respiratory) (NP (NN system) (NN disease))))))))) (. .)))