491
Timolol gellan showed a numerically but not significantly smaller reduction in 24 - hour heart rate , compared with timolol solution .
 Chemical: Timolol; Chemical: timolol
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: Timolol, timolol 
Answer:
 Chemical: Timolol; Chemical: timolol