CREATE TABLE table_34560 ("Year" TEXT, "Team" TEXT, "Progress" TEXT, "Score" TEXT, "Opponents" TEXT)

Which Opponents have a Team of arsenal, and a Year of 1963 64?
SELECT "Opponents" FROM table_34560 WHERE "Team" = 'arsenal' AND "Year" = '1963–64'
SELECT "Opponents" FROM "table_34560" WHERE "Team" = 'arsenal' AND "Year" = '1963–64'