2501
Bisoprolol was found to be an effective beta - adrenoceptor antagonist , the pA2 values determined against isoprenaline in guinea pig atria and tracheal muscle being 7 . 45 and 6 . 41 , respectively .
 GENE: beta - adrenoceptor
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: beta - adrenoceptor 
Answer:
 GENE: beta - adrenoceptor