( ( Digestion ( of macronutrients ) ) ( ( begins ( in ( ( the mouth ) ( with ( enzyme action ) ) ) ) ) on ) )
(ROOT (S (NP (NP (NNP Digestion)) (PP (IN of) (NP (NNS macronutrients)))) (VP (VBZ begins) (PP (IN in) (NP (NP (DT the) (NN mouth)) (PP (IN with) (NP (JJ enzyme) (NN action))))) (PP (IN on)))))
Digestion of macronutrients begins in the mouth with enzyme action on
(ROOT (S (NP (JJ Carbohydrate) (NN digestion)) (VP (VBZ begins) (PP (IN in) (NP (DT the) (NN mouth)))) (. .)))