47551
The majority of combat deaths in the Napoleonic Wars , World War I , and World War II were caused by artillery .
 Napoleonic Wars, World War I, World War II
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:
 Napoleonic Wars, World War I, World War II