Weather systems are thought to be the primary reason for the occurrence of birds in autumn; some birds seen in spring may simply be overshoots, although ship-assistance may also play a part.
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: Weather systems are thought to be the primary reason for the occurrence of birds in autumn; some birds seen in spring may simply be overshoots, although ship-assistance may also play a part. ### Response: .