777
By the time of the first century BC , Zoroastrianism had become the dominant religion of the region ; however , the region would go through two other religious transformations .
 location: Zoroastrianism
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: Zoroastrianism