( ( ( This research ) ( on ( water quality ) ) ) ( ( has ( two ( main components ) ) ) . ) )
(ROOT (S (NP (NP (DT This) (NN research)) (PP (IN on) (NP (NN water) (NN quality)))) (VP (VBZ has) (NP (CD two) (JJ main) (NNS components))) (. .)))
This research on water quality has two main components.
(ROOT (S (NP (NNP Water)) (VP (VBZ is) (NP (NP (DT the) (JJ main) (NN component)) (PP (IN of) (NP (NN milk))))) (. .)))