CREATE TABLE table_204_180 (id NUMBER, "date" CLOB, "opponent#" CLOB, "rank#" CLOB, "site" CLOB, "result" CLOB, "attendance" NUMBER)

who was their only opponent in december ?
SELECT "opponent#" FROM table_204_180 WHERE "date" = 12
SELECT "opponent#" FROM "table_204_180" WHERE "date" = 12