CREATE TABLE table_73664 ("Circuit" CLOB, "Difficulty" CLOB, "Turns" FLOAT, "Direction" CLOB, "Setting" CLOB, "Conditions" CLOB, "Unlock Order" FLOAT, "Unlocks" CLOB, "Unlocked by" CLOB)

What is the difficulty of the athens circuit?
SELECT "Difficulty" FROM table_73664 WHERE "Circuit" = 'Athens'
SELECT "Difficulty" FROM "table_73664" WHERE "Circuit" = 'Athens'