question: What are the characteristics of asthma ?
answer: recurrent episodes of wheezing , shortness of breath , chest tightness , and coughing
turker_answer: Recurrent episodes of wheezing , shortness of breath , chest tightness , and coughing are characteristics of asthma .
rule-based: The characteristics of asthma are recurrent episodes of wheezing , shortness of breath , chest tightness , and coughing .