18738
Lacto - N - biosidase consists of three domains , and the C - terminal domain has a unique beta - trefoil - like fold .
 Chemical: N; Chemical: C
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: N; Chemical: C