CREATE TABLE table_3921 ("Outcome" CLOB, "Edition" CLOB, "Opponent Team" CLOB, "Surface" CLOB, "Partner" CLOB, "Opponents" CLOB, "Score" CLOB)

In what edition was the opponent team Zimbabwe?
SELECT "Edition" FROM table_3921 WHERE "Opponent Team" = 'Zimbabwe'
SELECT "Edition" FROM "table_3921" WHERE "Opponent Team" = 'Zimbabwe'