The number of individuals in deme K remained at 8935 until 1937.273 generations ago, at which time it changed to a new stable size of 1778.
time_units: generations
demes:
  - name: K
    start_time: .inf
    epochs:
      - start_size: 8935
        end_time: 1937.273
      - start_size: 1778
        end_time: 0