{α : Type u_2} →
  {β : α → Type u_1} →
    (a : α) →
      (motive : Option (β a) × List (Sigma β) → Sort u_3) →
        (x : Option (β a) × List (Sigma β)) → ((b' : Option (β a)) → (l' : List (Sigma β)) → motive (b', l')) → motive x