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Rhetoric was later taught in universities during the Middle Ages as one of the three original liberal arts or trivium ( along with logic and grammar ) .
 time: Middle Ages
Please list all entity words in the text that fit the category.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} 
Answer:
 time: Middle Ages