trainings_machine_1:
  id: 1
  training_id: 2
  machine_id: 1

trainings_machine_2:
  id: 2
  training_id: 2
  machine_id: 2

trainings_machine_3:
  id: 3
  training_id: 4
  machine_id: 3

trainings_machine_4:
  id: 4
  training_id: 1
  machine_id: 4

trainings_machine_5:
  id: 5
  training_id: 3
  machine_id: 5