( ( All plants ) ( ( excrete oxygen ) ( through photosynthesis ) ) )
(ROOT (S (NP (DT All) (NNS plants)) (VP (VBP excrete) (NP (NN oxygen)) (PP (IN through) (NP (NN photosynthesis))))))
All plants excrete oxygen through photosynthesis
(ROOT (S (NP (NNP Oxygen)) (VP (VBZ is) (VP (VBN made) (PP (IN by) (NP (NP (NNS trees)) (CC and) (NP (JJ other) (NNS plants)))) (PP (IN during) (NP (NN photosynthesis))))) (. .)))