For deme H, the population count was 6659 until a change 1208.52 generations ago, where it changed to 1247, remaining steady thereafter.
time_units: generations
demes:
  - name: H
    start_time: .inf
    epochs:
      - start_size: 6659
        end_time: 1208.52
      - start_size: 1247
        end_time: 0