The number of individuals in deme V remained at 4957 until 3478.795 generations ago, at which time it changed to a new stable size of 7906.
time_units: generations
demes:
  - name: V
    start_time: .inf
    epochs:
      - start_size: 4957
        end_time: 3478.795
      - start_size: 7906
        end_time: 0