( ( ( Phytoplankton and ) plankton ) ( ( ( are not ) equivalent ) . ) )
(ROOT (S (NP (NN Phytoplankton) (CC and) (NN plankton)) (VP (VBP are) (RB not) (ADJP (JJ equivalent))) (. .)))
Phytoplankton and plankton are not equivalent.
(ROOT (S (NP (NNP Phytoplankton)) (VP (VBP make) (NP (NP (NN food)) (PP (IN via) (NP (NN photosynthesis))))) (. .)))