( ( Fructose ( -LRB- ( levulose -RRB- ) ) ) ( ( ( ( ( ( is ( ( found naturally ) ( in fruits ) ) ) , ) and ) therefore ) ( is ( ( referred to ) ( as ( fruit sugar ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Fructose)) (PRN (-LRB- -LRB-) (NP (NN levulose)) (-RRB- -RRB-))) (VP (VP (VBZ is) (VP (VBN found) (ADVP (RB naturally)) (PP (IN in) (NP (NNS fruits))))) (, ,) (CC and) (ADVP (RB therefore)) (VP (VBZ is) (VP (VBN referred) (S (VP (TO to))) (PP (IN as) (NP (NN fruit) (NN sugar)))))) (. .)))
Fructose (levulose) is found naturally in fruits, and therefore is referred to as fruit sugar.
(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))))))))) (. .)))