story: Mitch stayed at a hotel for a week one time. The maid would change his sheets even though she didn't have to. On the last day Mitch was there he left a large tip for the maid. When Mitch was checking out, the maid came up to him and thanked him. Mitch told her she deserved it and smiled as he walked away.
 selected sentence: The maid would change his sheets even though she didn't have to.
The maid changes his sheets >Causes/Enables> Mitch gives her a tip