time_units: generations
demes:
- name: a
  epochs:
  - {start_size: 100, cloning_rate: 0.1}
- name: b
  epochs:
  - {start_size: 200, end_time: 0}
- name: c
  epochs:
  - {start_size: 1, end_time: 100, cloning_rate: 0.3}
  - {start_size: 2}