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The Society is open to anyone with a desire to learn more about astronomy , and gives members access to talks and lectures by astronomers and astrophysicist s , and allows them to use equipment at the N.P. Wieth-Knudsen Observatory in Tisvilde to observe astronomical phenomena .
 location: Tisvilde
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Tisvilde 
Answer:
 location: Tisvilde