19682
1 , 3 , 4 - thiadiazole and its derivatives : a review on recent progress in biological activities .
 Chemical: 1 , 3 , 4 - thiadiazole
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: 1 , 3 , 4 - thiadiazole