( ( To ( these compounds ) ) ( ( ( ( ( ( belong , ) i.a. ) , ) all ) ( ( ( ( ( kinds ( of ( ( starch , ) ( which ( ( ( ( ( constitute ( ( such ( an ( important part ) ) ) ( of ( our food ) ) ) ) , ) and ) also ) cellulose ) ) ) ) ) , ) ( ( the ( building material ) ) ( of ( the plants ) ) ) ) , ) ( which ( represents ( ( the ( ( most complicated ) form ) ) ( of ( the carbohydrates ) ) ) ) ) ) ) . ) )
(ROOT (SINV (PP (TO To) (NP (DT these) (NNS compounds))) (VP (VBP belong) (, ,) (VBP i.a.) (, ,) (ADVP (DT all))) (NP (NP (NNS kinds)) (PP (IN of) (NP (NP (NN starch)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VP (VBP constitute) (NP (NP (PDT such) (DT an) (JJ important) (NN part)) (PP (IN of) (NP (PRP$ our) (NN food))))) (, ,) (CC and) (ADVP (RB also)) (VP (VBZ cellulose))))))) (, ,) (NP (NP (DT the) (NN building) (NN material)) (PP (IN of) (NP (DT the) (NNS plants)))) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ represents) (NP (NP (DT the) (ADJP (RBS most) (JJ complicated)) (NN form)) (PP (IN of) (NP (DT the) (NNS carbohydrates)))))))) (. .)))
To these compounds  belong, i.a., all kinds of starch, which constitute such an important part of our food, and also cellulose , the building material of the plants, which represents the most complicated form of the carbohydrates.
(ROOT (S (NP (NNP Cellulose)) (VP (VP (VBZ is) (NP (NP (CD one)) (PP (IN of) (NP (NP (DT the) (ADJP (RBS most) (JJ common)) (JJ biochemical) (NNS compounds)) (PP (IN on) (NP (NN earth))))))) (CC and) (VP (VBZ is) (VP (VBN found) (PP (IN in) (NP (DT all) (NNS plants)))))) (. .)))