10284
When trained with positive reinforcement , rats can learn to respond to a signal of a certain duration , but not to signals of shorter or longer durations , which demonstrates that they can discriminate between different durations .
 animal: rats
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: rats 
Answer:
 animal: rats