2301
Expression of human complement receptor type 2 ( CR2 / CD21 ) is primarily restricted to mature B cells and follicular dendritic cells .
 GENE: human complement receptor type 2; GENE: CR2; GENE: CD21
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: human complement receptor type 2; GENE: CR2; GENE: CD21