101802
To try to offset some of the environmental concerns associated with the scheme , some of the stored water was specifically set aside to make special releases to help fisheries , to provide recreational opportunities ( canoeing and white-water rafting on the Afon Tryweryn ) and to disperse pollution events should they occur .
 location: Afon Tryweryn
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: Afon Tryweryn 
Answer:
 location: Afon Tryweryn