( ( ( The ( main components ) ) ( of rastra ) ) ( ( are ( ( cement , ) ( ( water and ) ( expanded polystyrene ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ main) (NNS components)) (PP (IN of) (NP (NN rastra)))) (VP (VBP are) (NP (NP (NN cement)) (, ,) (NP (NP (NN water)) (CC and) (NP (VBN expanded) (NN polystyrene))))) (. .)))
The main components of rastra are cement, water and expanded polystyrene.
(ROOT (S (NP (NNP Water)) (VP (VBZ is) (NP (NP (DT the) (JJ main) (NN component)) (PP (IN of) (NP (NN milk))))) (. .)))