It mostly consists of pieces written to be sung by a church choir, which may sing a capella or accompanied by an organ.
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: It mostly consists of pieces written to be sung by a church choir, which may sing a capella or accompanied by an organ. ### Response: .