( ( ( The digestion ) ( of food ) ) ( ( is ( completed ( in ( the ( small intestine ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN digestion)) (PP (IN of) (NP (NN food)))) (VP (VBZ is) (VP (VBN completed) (PP (IN in) (NP (DT the) (JJ small) (NN intestine))))) (. .)))
The digestion of food is completed in the small intestine.
(ROOT (S (NP (NP (JJS Most)) (PP (IN of) (NP (DT the) (NN digestion) (NNS reactions)))) (VP (VBP occur) (PP (IN in) (NP (DT the) (JJ small) (NN intestine)))) (. .)))