How many scores are there when the championship game opponent is Miami University?
CREATE TABLE "conference_tournament_championships" (
  "tournament" real,
  "conference" text,
  "championship_game_opponent" text,
  "score" text,
  "location" text,
  "head_coach" text
);
SELECT COUNT("score") FROM "conference_tournament_championships" WHERE "championship_game_opponent"='Miami University';