( Mouth ( ( The mouth ) ( ( is ( ( the beginning ) ( of ( ( the ( gastrointestinal tract ) ) ( which ( is ( used ( for ( ( ( digestion and ) absorption ) ( of ( ( food and ) nutrients ) ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB Mouth)) (NP (DT The) (NN mouth)) (VP (VBZ is) (NP (NP (DT the) (NN beginning)) (PP (IN of) (NP (NP (DT the) (JJ gastrointestinal) (NN tract)) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (VP (VBN used) (PP (IN for) (NP (NP (NN digestion) (CC and) (NN absorption)) (PP (IN of) (NP (NN food) (CC and) (NNS nutrients))))))))))))) (. .)))
Mouth The mouth is the beginning of the gastrointestinal tract which is used for digestion and absorption of food and nutrients.
(ROOT (S (NP (NNP Digestion)) (VP (VBZ begins) (PP (IN in) (NP (DT the) (NN mouth)))) (. .)))