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A spree killer , also known as a rampage killer , is an individual who carries out a murderous assault on multiple victims in multiple locations in a short period of time - distinguished from mass murderers ( e.g. , Richard Speck ) , and serial killers ( e.g. , Ted Bundy ) .
 Richard Speck, Ted Bundy
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:
 Richard Speck, Ted Bundy