What is the total number of 3rd placed teams when the host is University of Manitoba, Winnipeg, Manitoba?
CREATE TABLE "results" (
  "year" real,
  "host" text,
  "1st_place" text,
  "2nd_place" text,
  "3rd_place" text,
  "4th_place" text,
  "5th_place" text
);
SELECT COUNT("3rd_place") FROM "results" WHERE "host"='University of Manitoba, Winnipeg, Manitoba';