100897
Prior to a naval battle with King Eumenes II of Pergamon , Hannibal sent a herald with a message for the opposing commander .
 Eumenes II, Pergamon, Hannibal
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:
 Eumenes II, Pergamon, Hannibal