Three thieves enter a warehouse full of crates...

Three thieves enter a warehouse full of crates, just as they were being chased by policemen who chanced upon them breaking into a jewelry shop. Now, the warehouse was for various farm produce, and sounds of farm animals still alive in the crates could be heard from some of them.

The first of the three thieves hurriedly instructed the other two to look for an empty crate and hide inside. And they did just that.

The police have entered the warehouse as well, and while they went about searching the place, they saw some movement on one of the crates. So the officers approached it.

One of the officers said, "What does it say on the label?" The other officer said, "It says chicken."

The first thief, having hidden in that exact same crate and not wanting to be found out, said, "Cock-a-doodle-doo!" The officers nodded to each other: it was chicken, alright.

They next saw some movement on another crate, and approached it. The first officer said, "What does it say on the label?" The other officer responded, "It says pig."

The second thief was hiding in that same crate, so he said, "Oink! Oink! Oink!" The two officers nodded to each other: it was pig alright.

The third thief was very nervous, and he shifted about in his crate, causing the police officers to notice the movement. Again, the first officer asked, "What does it say on the label?" The second officer replied, "It says tomato."

Not wanting to be found out, the third thief said, "I'm a tomato! I'm a tomato!"