10175
By becoming an important ally and later part of the Russian Empire and taking an oath to protect its southeastern borders , the Kalmyk Khanate took an active part in all Russian war campaigns in 17th and 18th centuries , providing up to 40,000 fully equipped horsemen .
 location: Russian Empire; location: Kalmyk Khanate
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Russian Empire; location: Kalmyk Khanate