56137
A large irrigated greenbelt , drawing on channels from the Volga river , lay outside the capital , where meadows and vineyards extended for some 20 " farsakhs " ( c .
 Volga
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Volga