2919
Multicenter , double - blind , multiple - dose , parallel - groups efficacy and safety trial of azelastine , chlorpheniramine , and placebo in the treatment of spring allergic rhinitis .
 Chemical: azelastine; Chemical: chlorpheniramine; Disease: spring allergic rhinitis
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: azelastine; Chemical: chlorpheniramine; Disease: spring allergic rhinitis