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Its introduction marked the return to a wide-scale use of silver coinage in the Byzantine Empire , and presaged the total abandonment of the gold coins around the middle of the century .
 location: Byzantine
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: Byzantine 
Answer:
 location: Byzantine