What is the total number of Years when the LLWS is 4th place, and when the City is Westport?
CREATE TABLE "llws_results" (
  "year" real,
  "champion" text,
  "city" text,
  "llws" text,
  "record" text
);
SELECT COUNT("year") FROM "llws_results" WHERE "llws"='4th place' AND "city"='westport';