( ( The ( plankton community ) ) ( ( is ( composed ( of ( ( phytoplankton and ) zooplankton ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN plankton) (NN community)) (VP (VBZ is) (VP (VBN composed) (PP (IN of) (NP (NN phytoplankton) (CC and) (NN zooplankton))))) (. .)))
The plankton community is composed of phytoplankton and zooplankton.
(ROOT (S (NP (NNP Phytoplankton)) (VP (VBP make) (NP (NP (NN food)) (PP (IN via) (NP (NN photosynthesis))))) (. .)))