21748
Batch synthesis of fructosyl - galacto - oligosaccharides from lactulose was performed with commercial beta - galactosidase preparations from Aspergillus oryzae , Kluyveromyces lactis and Bacillus circulans .
 Chemical: fructosyl - galacto - oligosaccharides; Chemical: lactulose
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: fructosyl - galacto - oligosaccharides; Chemical: lactulose