∀ {G : Type u_3} [inst : TopologicalSpace G] [PolishSpace G] [inst_2 : AddGroup G] [inst_3 : MeasurableSpace G]
  [BorelSpace G] {N : AddSubgroup G} [T2Space (G ⧸ N)] [SecondCountableTopology (G ⧸ N)], BorelSpace (G ⧸ N)