[ { "voice": [ "texture/task_comparison/texture_pair_016.wav" ], "conversations": [ { "from": "human", "value": "You are given a concatenated audio of two clips with 0.5 seconds of silence in between. Please determine which clip is the sound of helicopter? Only answer letter 'A' (refers to the first clip) or 'B' (refers to the second clip). Do not add any explanation, punctuation, or extra text.