5958
As a title of sovereignty the term under the Roman Republic had all the associations of the Greek Tyrannos ; refused during the early principate , it finally became an official title of the Roman Emperor s under Diocletian ( this is where the term dominate , used to describe a political system of Roman Empire in 284-476 , is derived from ) .
 location: Roman Republic; person: Diocletian; location: Roman Empire
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: Roman Republic; person: Diocletian; location: Roman Empire