{
  "source_nodes": [
    1406,
    4716,
    5316,
    13396
  ],
  "source_legs": [
    3310,
    600,
    8080
  ],
  "inverse_nodes": [
    1406,
    2736,
    3336,
    11416
  ],
  "shifts": [
    -1980,
    -1980,
    -1980
  ]
}