Nixon was the ninth incumbent president not to complete the four-year term to which they had been elected since the presidency was established in 1789.
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: Nixon was the ninth incumbent president not to complete the four-year term to which they had been elected since the presidency was established in 1789. ### Response: .