Table: broncos_1968_season
Columns: week
date
opponent
result
game_site
record
attendance

Question: Of the times the Broncos played the Cincinnati Bengals, what was the highest attendance?
SQL: SELECT MAX("attendance") FROM broncos_1968_season WHERE "opponent" = 'Cincinnati Bengals'

Question: When did the Broncos play the Miami Dolphins?
SQL: SELECT "date" FROM broncos_1968_season WHERE "opponent" = 'Miami Dolphins'

Question: In the game with an attendance of 18304, what was the final score?
SQL: SELECT "result" FROM broncos_1968_season WHERE "attendance" = 18304