∀ {C : Type u₁} [inst : CategoryTheory.Category.{v₁, u₁} C] [inst_1 : CategoryTheory.CartesianMonoidalCategory C]
  {X : C} (f : X ⟶ CategoryTheory.MonoidalCategoryStruct.tensorUnit C)
  (Y : CategoryTheory.Over (CategoryTheory.MonoidalCategoryStruct.tensorUnit C)),
  (CategoryTheory.ChosenPullbacksAlong.pullback f).obj Y =
    CategoryTheory.Over.mk (CategoryTheory.SemiCartesianMonoidalCategory.snd Y.left X)