story: The other day I took a train ride into the city. When I showed up at the train station it was very busy. It took a long time to find my seat on the train. When I got on the train it took forever to get moving. Once the train got moving the trip wasn't so bad.
 selected sentence: When I got on the train it took forever to get moving.
I want(s) to take the train to the city >Motivates> I get on the train