question: What are the four factors that determine how the body reacts to an antigen ?
answer: person 's age , antigen type , maternal factors and the area
turker_answer: The four factors that determine how the body reacts to an antigen are the person 's age , antigen type , maternal factors and the body area .
rule-based: The four factors that determine how the body reacts to an antigen are person 's age , antigen type , maternal factors and the area .