CREATE TABLE table_51483 ("Week" FLOAT, "Date" CLOB, "Opponent" CLOB, "Result" CLOB, "Attendance" CLOB)

Who did the Chiefs play at the game attended by 34,063?
SELECT "Opponent" FROM table_51483 WHERE "Attendance" = '34,063'
SELECT "Opponent" FROM "table_51483" WHERE "Attendance" = '34,063'