What is the lowest year that has chester-le-street as the city, with 345 runs as the score?
CREATE TABLE "largest_margin_of_runs_victory" (
  "score" text,
  "opposition" text,
  "venue" text,
  "city" text,
  "year" real
);
SELECT MIN("year") FROM "largest_margin_of_runs_victory" WHERE "city"='chester-le-street' AND "score"='345 runs';