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A nursery school teacher was delivering a station wagon full of kids home one day when a fire truck zoomed past. Sitting in the front seat of the fire truck was a Dalmatian dog. The children began discussing the dog's duties.

"They use him to keep crowds back," said one youngster.

"No," said another. "He's just for good luck."

A third child brought the argument to a close with this comment: "They use the dogs," she said firmly, "to find the fire hydrants."