Originally, deme T had a population size of 7926, which changed to 1023 around 7572.21 generations ago and has not changed since.
time_units: generations
demes:
  - name: T
    start_time: .inf
    epochs:
      - start_size: 7926
        end_time: 7572.21
      - start_size: 1023
        end_time: 0