CREATE TABLE table_78611 ("Week" FLOAT, "Date" CLOB, "Opponent" CLOB, "Result" CLOB, "Attendance" FLOAT)

What is the highest number in attendance against the game at Kansas City Chiefs?
SELECT MAX("Attendance") FROM table_78611 WHERE "Opponent" = 'at kansas city chiefs'
SELECT MAX("Attendance") FROM "table_78611" WHERE "Opponent" = 'at kansas city chiefs'