( Fructose ( ( is ( ( the ( main sugar ) ) ( found ( in ( many fruits ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Fructose)) (VP (VBZ is) (NP (NP (DT the) (JJ main) (NN sugar)) (VP (VBN found) (PP (IN in) (NP (JJ many) (NNS fruits)))))) (. .)))
Fructose is the main sugar found in many fruits.
(ROOT (S (NP (NNP Fructose)) (VP (VBZ is) (NP (NP (DT a) (NN sugar)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (VP (VBN found) (PP (IN in) (NP (NNS fruits))))))))) (. .)))