90550
Heidelberg has , at the beginning of the 21st century , more than three million visitors a year and about 1,000,000 overnight stays .
 location: Heidelberg
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: Heidelberg 
Answer:
 location: Heidelberg