CREATE TABLE "grand_tour_results_timeline" (
  "1954" text,
  "1955" text,
  "1956" text,
  "1957" text,
  "1958" text,
  "1959" text,
  "1960" text,
  "1961" text,
  "1962" text,
  "1963" text,
  "1964" text,
  "1965" text
);

Question: Tell me the 1958 when 1957 is dnf-9
SQL: SELECT "1958" FROM "grand_tour_results_timeline" WHERE "1957"='dnf-9';