{
  "labels":[
    "mitral_valve_native_regurgitation_not_present",
    "mitral_valve_native_regurgitation_mild",
    "mitral_valve_native_regurgitation_moderate",
    "mitral_valve_native_regurgitation_severe"
  ],
  "spans_key":"sc",
  "threshold":null,
  "max_positive":1,
  "negative_weight":0.6,
  "allow_overlap":true
}