Coat of arms of the city of Turku is based on a medieval seal dating back to 1309.
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: Coat of arms of the city of Turku is based on a medieval seal dating back to 1309. ### Response: .