19685
The broad and potent activity of thiadiazole and their derivatives has established them as pharmacologically significant scaffolds .
 Chemical: thiadiazole
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: thiadiazole 
Answer:
 Chemical: thiadiazole