What is the plant hardiness zone in the Northern region where the annual precipitation is 443mm (17.4in)?
CREATE TABLE "climate" (
  "city" text,
  "region" text,
  "july" text,
  "january" text,
  "annual_precipitation" text,
  "plant_hardiness_zone" text
);
SELECT "plant_hardiness_zone" FROM "climate" WHERE "region"='northern' AND "annual_precipitation"='443mm (17.4in)';