Definition: In this task, you will be given a short story. One sentence from the story is chosen. Consider the events that happen before that sentence, or are likely to have happened before it. Does any of them directly cause it, or simply make it possible? You should write your answer in the form " A >causes/enables> B". Try to use phrases and sentences from the story to compose your answer when possible.
Input: story: I went to visit my father's grave. My son put flowers beside it. I talked to him a little about my dad. Afterward he went back to the car and I talked to dad alone for awhile. I said I was sorry we were never close, and walked away.
 selected sentence: I said I was sorry we were never close, and walked away.

I went to my father's grave >Causes/Enables> I apologize to my dead father