{
  "civil_order": [
    "11206 BC",
    "4836 BC",
    "1406 BC",
    "AD65"
  ],
  "widths": [
    6370,
    3430,
    1470
  ],
  "units490": [
    13,
    7,
    3
  ],
  "source_constraints": {
    "SP_to_Conquest": 20,
    "MT_Flood_to_Conquest": 7,
    "Conquest_to_AD65": 3
  },
  "derived_first_leg": "20-7=13"
}