CREATE TABLE table_5573 ("Outcome" CLOB, "Date" CLOB, "Tournament" CLOB, "Surface" CLOB, "Partner" CLOB, "Opponents in Final" CLOB, "Score in Final" CLOB)

Which Partner has a Date of june 18, 1989?
SELECT "Partner" FROM table_5573 WHERE "Date" = 'june 18, 1989'
SELECT "Partner" FROM "table_5573" WHERE "Date" = 'june 18, 1989'