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For example , a person dying from complications from influenza ( an infection ) , a heart attack ( an internal body malfunction ) , or sudden heart failure would be listed as having died from natural causes .
 influenza, heart attack, heart failure
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 influenza, heart attack, heart failure