For deme L, the population count was 9146 until a change 1037.948 generations ago, where it reduced to 6734, remaining steady thereafter.
time_units: generations
demes:
  - name: L
    start_time: .inf
    epochs:
      - start_size: 9146
        end_time: 1037.948
      - start_size: 6734
        end_time: 0