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They are listed largely related to the story , but many of the levels are separate challenges unrelated to the growth of the grey goo , such as a level where the goo must eat hippopotamus babies but avoid the adults until it is large enough .
 animal: hippopotamus
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: hippopotamus 
Answer:
 animal: hippopotamus