{
  "nodes_BC": [
    7536,
    5436,
    4836,
    536
  ],
  "roles": [
    "MT completed inverse cumulative Flood",
    "SP completed inverse cumulative Flood / ordinary MT cumulative Shem",
    "ordinary and held-inverse MT cumulative Flood",
    "restoration"
  ],
  "edges": [
    2100,
    600,
    4300
  ],
  "whole": 7000
}