Please answer the following question: Question: what is the key to understanding the movie? If there is no answer, please output "Insufficient information to provide an answer.". Movie title: The Firemen's Ball Context: The volunteer fire department in a small Czechoslovak town decides to organize a ball in a townhall with raffle and a beauty pageant. The firefighters also plan to present a small ceremonial fire axe as the birthday gift to their retired chairman who has cancer (although they believe he may not know of it). During the ball, three of the members of the firefighter's committee look for eight candidates for the beauty contest, but they have difficulty finding enough of them. A man continues to buy drinks for the committee members to persuade them to include his overweight daughter among the candidates. During the ball the raffle prizes start to disappear from the table, fine consumables first. Josef, one of the firefighters, knows the prizes have been stolen, but is unable to recover them, and even finds out that his wife is involved in the theft. After much trouble, enough candidates for the beauty contest are found, and they are told that the winner will present a gift to their honorary chairman after the end of the contest. However, when the contest begins, the girls decide not to participate and lock themselves in the bathroom. Consequently, the crowd uses force to draw the replacement candidates to the stage. Soon afterwards, the siren sounds because a house of an old man is on fire. All people immediately begin to leave the townhall without paying for the drinks they consumed. With the fire engine stuck in the snow, the firefighters manage to save some furniture from the house, but are unable to extinguish the fire. To help the old man who lost almost everything in a fire, the people donate their raffle tickets to him. However, it is soon discovered almost all of the prizes had been stolen during the ball (except for some items of lesser value). The firefighters order the unknown thieves to return the stolen prizes once they turn off the lights, but during the period of darkness the remaining items are also stolen. Realizing this, the firefighter's committee moves backstage to discuss what they can do to...
A:
it was necessary to keep silence