21955
It is mentioned by Strabo in his " Geographica " as " an exceedingly well-governed city " , It had its own mint , stamping coins showing a cow suckling her calf on the obverse and a double stellate pattern on the reverse , which have been found as far away as the basin of the Danube .
 Strabo, Danube
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Strabo, Danube