CREATE TABLE table_50392 ("Outcome" TEXT, "Date" TEXT, "Championship" TEXT, "Surface" TEXT, "Opponent in the final" TEXT, "Score in the final" TEXT)

What is the surface of the palermo, italy championship?
SELECT "Surface" FROM table_50392 WHERE "Championship" = 'palermo, italy'
SELECT "Surface" FROM "table_50392" WHERE "Championship" = 'palermo, italy'