{
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    "count": 23707,
    "interface_kind": "engineering",
    "membership": "/data/digital-drosophila/experiments/phase4e-visual-calibration/populations/engineering-first-order.parquet",
    "selection": "Phase4C audited hierarchy=first_order",
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    "stimulation_mode": "external_synaptic_drive",
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    "count": 4407,
    "interface_kind": "engineering",
    "membership": "/data/digital-drosophila/experiments/phase4e-visual-calibration/populations/engineering-higher-visual.parquet",
    "selection": "Phase4C audited hierarchy=higher_visual",
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    "stimulation_mode": "external_synaptic_drive",
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    "count": 81483,
    "interface_kind": "engineering",
    "membership": "/data/digital-drosophila/experiments/phase4e-visual-calibration/populations/engineering-second-order.parquet",
    "selection": "Phase4C audited hierarchy=second_order",
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    "stimulation_mode": "external_synaptic_drive",
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    "count": 9203,
    "field": "annotation_superclass",
    "interface_kind": "engineering",
    "membership": "/data/digital-drosophila/experiments/phase4e-visual-calibration/populations/engineering-visual-projection.parquet",
    "selection": "annotation_superclass in ['visual_projection', 'visual_projection_tbc']",
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    "values": [
      "visual_projection",
      "visual_projection_tbc"
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    "count": 6091,
    "interface_kind": "biological-reference",
    "membership": "/data/digital-drosophila/experiments/phase4e-visual-calibration/populations/reference-photoreceptor.parquet",
    "selection": "Phase4C audited hierarchy=visual_sensory",
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    "stimulation_mode": "spike_injection",
    "value": "visual_sensory"
  }
}