( ( Bromine water ) ( ( ( ( ( is brown ) , ) and ) ( will ( ( lose ( its colour ) ) ( ( ( with ( an alkene ) ) ( but not ) ) ( with ( an alkane ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Bromine) (NN water)) (VP (VP (VBZ is) (ADJP (JJ brown))) (, ,) (CC and) (VP (MD will) (VP (VB lose) (NP (PRP$ its) (NN colour)) (PP (PP (IN with) (NP (DT an) (NN alkene))) (CONJP (CC but) (RB not)) (PP (IN with) (NP (DT an) (NN alkane))))))) (. .)))
Bromine water is brown , and will lose its colour with an alkene but not with an alkane .
(ROOT (S (NP (NNS Alkenes)) (VP (VBP are) (VP (VBN formed) (PP (IN from) (NP (NP (DT an) (NN alcohol)) (SBAR (WHNP (WDT that)) (S (VP (VBZ loses) (NP (NN water))))))))) (. .)))