Deme E maintained a population of 3300 until there was a shift 3797.92 generations ago that increased its numbers to 3473, a figure that has remained the same since.
time_units: generations
demes:
  - name: E
    start_time: .inf
    epochs:
      - start_size: 3300
        end_time: 3797.92
      - start_size: 3473
        end_time: 0