( ( ( ( ( 15 Lactose ) , ) ( the ( milk sugar ) ) ) , ) ( ( is ( ( a ( disaccharide carbohydrate ) ) ( that ( is ( unique ( to ( the ( mammary gland ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (CD 15) (NN Lactose)) (, ,) (NP (DT the) (NN milk) (NN sugar)) (, ,)) (VP (VBZ is) (NP (NP (DT a) (JJ disaccharide) (NN carbohydrate)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (ADJP (JJ unique) (PP (TO to) (NP (DT the) (JJ mammary) (NN gland))))))))) (. .)))
15 Lactose, the milk sugar, is a disaccharide carbohydrate that is unique to the mammary gland.
(ROOT (S (NP (RB Double) (NNS sugars)) (VP (VBP are) (VP (VBN called) (NP (NNS disaccharides)))) (. .)))