The phone rings at KGB headquarters.
"Hello, is this KGB?"
"Yes. What do you want?"
"I'm calling to report my neighbor Yankel Rabinovitz as an enemy of the State. He is hiding undeclared diamonds in some fallen trees on his property."
"This will be noted." Next day, the KGB patrol arrives at the Rabinovitz's house. They chop the trees into pieces, but find no diamonds.
Later the phone rings at the Rabinovitz house. "Hello, Yankel! Did the KGB come?"
"Yes. Did they chop your firewood?"
"Yes, they did." "Okay, now it's your turn to call. I need my vegetable patch plowed.