CREATE TABLE table_45256 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" TEXT)

What is the earliest week with an opponent of cincinnati bengals?
SELECT MIN("Week") FROM table_45256 WHERE "Opponent" = 'cincinnati bengals'
SELECT MIN("Week") FROM "table_45256" WHERE "Opponent" = 'cincinnati bengals'