3447
Deliberate hypotension induced by labetalol with halothane , enflurane or isoflurane for middle - ear surgery .
 Disease: hypotension; Chemical: labetalol; Chemical: halothane; Chemical: enflurane; Chemical: isoflurane
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:
 Disease: hypotension; Chemical: labetalol; Chemical: halothane; Chemical: enflurane; Chemical: isoflurane