story: Lan walked to the beach. She walked through the sand until she was up to the surf. Lan stepped into the water where it was almost to her knees. She tried to walk further where the water was above her chest. The waves splashed her back to the shore.
 selected sentence: She walked through the sand until she was up to the surf.
Lan like(s) walking on the beach >Motivates> She walks on the sand up to the surf