story: Tom wanted an apple from his apple tree. There was a beautiful one right at the top of the tree. He tried to climb the tree but couldn't reach the apple. He found a long stick that he used to knock it down. The apple fell and hit him on the head.
 selected sentence: He tried to climb the tree but couldn't reach the apple.
Tom can't reach the apple >Causes/Enables> Tom uses a long stick to knock it down