CREATE TABLE "grand_tour_results_timeline" (
  "1953" text,
  "1954" text,
  "1955" text,
  "1956" text,
  "1957" text,
  "1958" text,
  "1959" text,
  "1960" text,
  "1961" text,
  "1962" text,
  "1963" text
);

Question: what is 1958 when 1957 is 2 and 1956 is 3?
SQL: SELECT "1958" FROM "grand_tour_results_timeline" WHERE "1957"='2' AND "1956"='3';

Question: what is 1955 when 1961 is n/a?
SQL: SELECT "1955" FROM "grand_tour_results_timeline" WHERE "1961"='n/a';