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In animal husbandry , " feed conversion ratio " ( " FCR " ) or " feed conversion rate " is a ratio or rate measuring of the efficiency with which the bodies of livestock convert animal feed into the desired output .
 animal: livestock; food: animal feed
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: livestock, animal feed 
Answer:
 animal: livestock; food: animal feed