story: Billy has asked Santa for a sled for Christmas. So he was really hoping it would be a white Christmas. The weatherman was calling for snow when he went to bed. The next morning he woke up to snow on the ground. He had gotten his sled, too.
 selected sentence: The weatherman was calling for snow when he went to bed.
The weatherman looks at the weather patterns >Causes/Enables> The weatherman predicts snow