CREATE TABLE table_51129 ("Week" FLOAT, "Date" CLOB, "Opponent" CLOB, "Result" CLOB, "Attendance" FLOAT)

What was the attendance at the game where the opponent was the denver broncos?
SELECT "Attendance" FROM table_51129 WHERE "Opponent" = 'denver broncos'
SELECT "Attendance" FROM "table_51129" WHERE "Opponent" = 'denver broncos'