( Carbohydrates ( ( are ( ( starches and ) sugars ) ) . ) )
(ROOT (S (NP (NNS Carbohydrates)) (VP (VBP are) (NP (NNS starches) (CC and) (NNS sugars))) (. .)))
Carbohydrates are starches and sugars.
(ROOT (S (NP (NNS Carbohydrates)) (VP (VBP are) (NP (NP (DT an) (JJ important) (NN group)) (PP (IN of) (NP (JJ biological) (NNS molecules))) (SBAR (WHNP (WDT that)) (S (VP (VBZ includes) (NP (NNS sugars) (CC and) (NNS starches))))))) (. .)))