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Amiodarone represents an effective antiarrhythmic drug for cardioversion of recent - onset atrial fibrillation ( AF ) and maintenance of sinus rhythm .
 Chemical: Amiodarone; Disease: atrial fibrillation; Disease: AF
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: Amiodarone; Disease: atrial fibrillation; Disease: AF