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For example , John Locke held that some knowledge ( e.g. knowledge of God 's existence ) could be arrived at through intuition and reasoning alone .
 John Locke
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:
 John Locke