story: Jack had been eyeing a prize in his teacher's prize box all year. But Bill earned a trip to the prize box first. Bill picked the prize he knew Jack had wanted! When Bill saw how sad Jack looked, he felt guilty. Bill felt much better after he decided to give Jack the prize.
 selected sentence: But Bill earned a trip to the prize box first.
Bill earns a trip to the prize box >Causes> Bill feel(s) guilty