416
The antigen - specific IgG4 antibody seems to be an index in evaluating immunotherapy objectively .
 GENE: antigen - specific IgG4 antibody
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: antigen - specific IgG4 antibody 
Answer:
 GENE: antigen - specific IgG4 antibody