CREATE TABLE table_204_287 (id DECIMAL, "outcome" TEXT, "no." DECIMAL, "date" DECIMAL, "championship" TEXT, "surface" TEXT, "opponent in the final" TEXT, "score in the final" TEXT)

which championship only takes place in year 1975 ?
SELECT "championship" FROM table_204_287 WHERE "date" = 1975
SELECT "championship" FROM "table_204_287" WHERE "date" = 1975