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The tidal range in this part of the Bristol Channel is great , and since beach and mud flats are on a gentle slope , it is inadvisable to try to reach the sea at low tide , as the sand gives way to deep mud which has often resulted in loss of life over the years .
 location: Bristol Channel
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: Bristol Channel 
Answer:
 location: Bristol Channel