( Lactose ( ( is ( ( ( ( ( ( ( ( a ( disaccharide sugar ) ) ( -LRB- ( ( double ( sugar molecule ) ) -RRB- ) ) ) , ) ( which ( must ( be split ) ) ) ) ( -LRB- ( digested -RRB- ) ) ) ( into ( ( two ( simple sugars ) ) ( -LRB- ( monosaccharides -RRB- ) ) ) ) ) , ) ( ( glucose and ) galactose ) ) ) . ) )
(ROOT (S (NP (NNP Lactose)) (VP (VBZ is) (NP (NP (NP (NP (DT a) (JJ disaccharide) (NN sugar)) (PRN (-LRB- -LRB-) (NP (JJ double) (NN sugar) (NN molecule)) (-RRB- -RRB-)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (MD must) (VP (VB be) (VP (VBN split))))))) (PRN (-LRB- -LRB-) (VP (VBN digested)) (-RRB- -RRB-))) (PP (IN into) (NP (NP (CD two) (JJ simple) (NNS sugars)) (PRN (-LRB- -LRB-) (NP (NNS monosaccharides)) (-RRB- -RRB-)))) (, ,) (ADJP (JJ glucose) (CC and) (JJ galactose)))) (. .)))
Lactose is a disaccharide sugar (double sugar molecule), which must be split (digested) into two simple sugars (monosaccharides), glucose and galactose.
(ROOT (S (NP (RB Double) (NNS sugars)) (VP (VBP are) (VP (VBN called) (NP (NNS disaccharides)))) (. .)))