For deme H, the population count was 9247 until a change 4990.9286 generations ago, where it changed to 4744, remaining steady thereafter.
time_units: generations
demes:
  - name: H
    start_time: .inf
    epochs:
      - start_size: 9247
        end_time: 4990.9286
      - start_size: 4744
        end_time: 0