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The heart block was treated by pacemaker insertion and the heart failure resolved spontaneously following chloroquine discontinuation .
 Disease: heart block; Disease: heart failure; Chemical: chloroquine
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: heart block; Disease: heart failure; Chemical: chloroquine