11674
The histamine H1 receptor antagonists ( antihistamines ) are an important class of medications used for the relief of common symptoms associated with hyperhistaminic conditions occurring in children and adults .
 GENE: histamine H1 receptor
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: histamine H1 receptor 
Answer:
 GENE: histamine H1 receptor