177619
The skating sport was quite popular at the time , and the club had about 1000 members after two years , and more than 5000 members in 1870 , when Christiania had less than 70000 inhabitants .
 None
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:  
Answer:
 None