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For example , the Northern Song Dynasty ( 960 - 1127 ) constructed and maintained an extensive defensive forest in present-day Hebei .
 time: Northern Song Dynasty; location: Hebei
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: Northern Song Dynasty, Hebei 
Answer:
 time: Northern Song Dynasty; location: Hebei