( ( Most ( of ( ( the digestion ) ( of food ) ) ) ) ( ( takes ( place ( in ( the ( small intestine ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJS Most)) (PP (IN of) (NP (NP (DT the) (NN digestion)) (PP (IN of) (NP (NN food)))))) (VP (VBZ takes) (NP (NP (NN place)) (PP (IN in) (NP (DT the) (JJ small) (NN intestine))))) (. .)))
Most of the digestion of food takes place 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)))) (. .)))