( ( The ( disaccharides lactase ) ) ( ( ( breaks down ) ( lactose ( -LRB- ( ( milk sugar ) -RRB- ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS disaccharides) (NN lactase)) (VP (VBZ breaks) (PRT (RP down)) (NP (NP (NN lactose)) (PRN (-LRB- -LRB-) (NP (NN milk) (NN sugar)) (-RRB- -RRB-)))) (. .)))
The disaccharides lactase breaks down lactose (milk sugar).
(ROOT (S (NP (RB Double) (NNS sugars)) (VP (VBP are) (VP (VBN called) (NP (NNS disaccharides)))) (. .)))