What is the Nation when the Athlete was emma george, and a Record of 4.58m(15ft0¼in)?
CREATE TABLE "record_progression" (
  "record" text,
  "athlete" text,
  "nation" text,
  "venue" text,
  "date" text
);
SELECT "nation" FROM "record_progression" WHERE "athlete"='emma george' AND "record"='4.58m(15ft0¼in)';