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Valerius Maximus wrote that he was killed outside the city by a tortoise dropped by an eagle ( possibly a lammergeier or Cinereous vulture , which do open tortoises for eating by dropping them on hard objects ) which had mistaken his bald head for a rock suitable for shattering the shell of the reptile .
 Valerius Maximus, tortoise, Cinereous vulture
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:
 Valerius Maximus, tortoise, Cinereous vulture