21459
It hydrolyzes lactose to galactose and glucose and catalyzes the intramolecular isomerization of lactose to allolactose , the lac operon inducer .
 Chemical: lactose; Chemical: galactose; Chemical: glucose; Chemical: lactose; Chemical: allolactose
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: lactose; Chemical: galactose; Chemical: glucose; Chemical: lactose; Chemical: allolactose