The documentary, long believed to be lost, was publicly screened at the Institute of Contemporary Arts, London on 28 April 2011.
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: The documentary, long believed to be lost, was publicly screened at the Institute of Contemporary Arts, London on 28 April 2011. ### Response: .