When Saginaw's fare is $470.47, what was the fare to Grand Rapids?
CREATE TABLE "average_domestic_passenger_fares_for_cap" (
  "year" real,
  "lansing_lan" text,
  "detroit_dtw" text,
  "grand_rapids_grr" text,
  "flint_fnt" text,
  "kalamazoo_azo" text,
  "saginaw_mbs" text
);
SELECT "grand_rapids_grr" FROM "average_domestic_passenger_fares_for_cap" WHERE "saginaw_mbs"='$470.47';