8873
The Assyrians began to form and adopt a distinct Eastern Christianity , with its accompanying Syriac literature , between the 1st and 3rd centuries AD ; however , ancient Mesopotamian religion was still alive and well into the fourth century and pockets survived into the 10th century and possibly as late as the 17th century in Mardin .
 location: Mardin
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: Mardin