( Glucose ( ( is ( ( an ( important ( energy source ) ) ) ( for ( ( the functioning ) ( of ( ( all ( the cells ) ) ( of ( the body ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Glucose)) (VP (VBZ is) (NP (NP (DT an) (JJ important) (NN energy) (NN source)) (PP (IN for) (NP (NP (DT the) (NN functioning)) (PP (IN of) (NP (NP (PDT all) (DT the) (NNS cells)) (PP (IN of) (NP (DT the) (NN body))))))))) (. .)))
Glucose is an important energy source for the functioning of all the cells of the body.
(ROOT (S (NP (DT All) (NNS cells)) (VP (VBP need) (NP (NP (NN glucose)) (PP (IN for) (NP (NN energy))))) (. .)))