77902
In Medieval Europe , the climes for 15 and 18 hours were used to calculate the changing length of daylight through the year .
 time: Medieval Europe
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: Medieval Europe 
Answer:
 time: Medieval Europe