David's capital may have been in or near Tmutorakan; though rule by the Kievan Rus is reported in Russian sources before 985, it is conceivable that the Khazars reasserted control over the town or that David ruled as a client.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: David's capital may have been in or near Tmutorakan; though rule by the Kievan Rus is reported in Russian sources before 985, it is conceivable that the Khazars reasserted control over the town or that David ruled as a client. ### Response: .