{
    "example_1": {
        "length": 32000,
        "wav": "{data_root}/valid.wav",
        "speech": [[0.38, 2]]
    },
    "example_2": {
        "length": 32000,
        "wav": "{data_root}/valid.wav",
        "speech": [[0, 0.7]]
    },
    "example_3": {
        "length": 32000,
        "wav": "{data_root}/valid.wav",
        "speech": [[0.1, 1.88]]
    },
    "example_4": {
        "length": 32000,
        "wav": "{data_root}/valid.wav",
        "speech": []
    }
}