11928
Immunofixation experiments of C4A and C4B demonstrate > 41 allotypes in the two classes of proteins .
 GENE: C4A; GENE: C4B
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: C4A, C4B 
Answer:
 GENE: C4A; GENE: C4B