CREATE TABLE table_13296 ("Date" CLOB, "Opponent" CLOB, "Venue" CLOB, "Result" CLOB, "Scorers" CLOB)

who is the opponent on 31 jul?
SELECT "Opponent" FROM table_13296 WHERE "Date" = '31 jul'
SELECT "Opponent" FROM "table_13296" WHERE "Date" = '31 jul'