What is the Runner-up with the tier was tier ii, and a Winner of gigi fernández natalia zvereva 5–7, 6–1, 6–4?
CREATE TABLE "october" (
  "week_of" text,
  "tier" text,
  "winner" text,
  "runner_up" text,
  "semi_finalists" text
);
SELECT "runner_up" FROM "october" WHERE "tier"='tier ii' AND "winner"='gigi fernández natalia zvereva 5–7, 6–1, 6–4';