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.

[Q]: story: John walked outside one weekend morning. He noticed that his yard was incredibly sloppy and overgrown. John went to his shed and pulled out his lawn mower. After starting it up, John began to mow his lawn. He worked for an hour, and then his yard looked great again.
selected sentence: He noticed that his yard was incredibly sloppy and overgrown.
[A]: john walks into the yard >Causes/Enables> He notices his yard is sloppy

[Q]: story: Renny had a favorite cup he used every day. One day she told her son to put it in the sink for her. Her son grabbed the cup and walked towards the sink. On his way there, he tripped on a toy that was left on the ground. Renny's son and her favorite cup fell to the ground and her cup broke.
selected sentence: One day she told her son to put it in the sink for her.
[A]: The cup becomes dirty >Causes/Enables> She tells her son to

[Q]: story: When the summer came, Rico had to move back home. He was sad because he had made many new friends in Iowa. On the last day of school, Rico exchanged addresses with his friends. When Rico arrived home, he already had letters waiting for him. Rico has many new pen pals that he writes to every week.
selected sentence: On the last day of school, Rico exchanged addresses with his friends.
[A]:
Rico has to move home >Causes/Enables> Rico exchanges addresses with his friends