14424
An alternative strategy , exploiting breakthroughs in understanding the molecular basis of allergenicity and the key role of innate immune mechanisms in asthma , is to direct new approaches to the disease triggers themselves : allergens .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None