17028
The short - acting beta2 - agonists , including salbutamol , and fenoterol , have a rapid onset of action , a bronchodilating effect for 3 - 6 h and are used on demand .
 Chemical: salbutamol; Chemical: fenoterol
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: salbutamol; Chemical: fenoterol