1775
None of the subjects treated with buprenorphine had QTc interval > 0 . 440 s ( ( 1 / 2 ) ) .
 Chemical: buprenorphine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: buprenorphine