tasks {
  recipe_id: 0
  start_date: 7
  duration: 5
}
tasks {
  recipe_id: 0
  start_date: 5
  duration: 2
}
tasks {
  recipe_id: 0
  start_date: 2
  duration: 1
}
tasks {
  recipe_id: 0
  duration: 2
}
tasks {
  recipe_id: -1
  start_date: 15
  duration: 0
}
tasks {
  recipe_id: 0
  start_date: 12
  duration: 3
}
tasks {
  recipe_id: 0
  start_date: 3
  duration: 2
}
tasks {
  recipe_id: -1
  start_date: 8
  duration: 0
}
tasks {
  recipe_id: 0
  start_date: 5
  duration: 3
}
tasks {
  recipe_id: -1
  start_date: 11
  duration: 0
}
tasks {
  recipe_id: 0
  start_date: 8
  duration: 3
}
tasks {
  recipe_id: 0
  start_date: 12
  duration: 2
}
tasks {
  recipe_id: -1
  start_date: 44
  duration: 0
}
tasks {
  recipe_id: 0
  start_date: 14
  duration: 30
}
