3783
In humans , the gene for C3 deficiency is a null gene that is allelic to the structural gene for C3 and is not linked to the major histocompatibility locus .
 Disease: C3 deficiency
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
 Entities: C3 deficiency 
Answer:
 Disease: C3 deficiency