story: Fred took out a piece of paper and wanted to divide it in two. He used a ruler to measure the length of the paper. He wrote down that number on the paper itself. With math, he divided that number in two. Fred made a mark on the paper of half its length and drew a line.
 selected sentence: He wrote down that number on the paper itself.
Fred writes a number on a piece of paper >Causes/Enables> Fred divides the number by two