CREATE TABLE table_58983 ("Outcome" CLOB, "Date" CLOB, "Championship" CLOB, "Surface" CLOB, "Opponent in the final" CLOB, "Score in the final" CLOB)

What Championship has a Date of 26 may 1986?
SELECT "Championship" FROM table_58983 WHERE "Date" = '26 may 1986'
SELECT "Championship" FROM "table_58983" WHERE "Date" = '26 may 1986'