CREATE TABLE table_39508 ("Week" FLOAT, "Date" CLOB, "Opponent" CLOB, "Result" CLOB, "Game site" CLOB, "Kickoff  (  ET  ) " CLOB, "NFL Recap" CLOB, "Record" CLOB)

What is the kickoff time for the game that was at Ralph Wilson Stadium?
SELECT "Kickoff ( ET )" FROM table_39508 WHERE "Game site" = 'ralph wilson stadium'
SELECT "Kickoff ( ET )" FROM "table_39508" WHERE "Game site" = 'ralph wilson stadium'