How many years saw 3 hurricanes wherein the strongest storm was level three?
CREATE TABLE "1850s" (
  "year" real,
  "number_of_tropical_storms" real,
  "number_of_hurricanes" real,
  "number_of_major_hurricanes" real,
  "deaths" text,
  "strongest_storm" text
);
SELECT COUNT("year") FROM "1850s" WHERE "number_of_hurricanes"=3 AND "strongest_storm"='Three';