story: David was a college student. He did not have a lot of extra money. David saw a nice blue velvet couch on the curb with a free sign on it. David called a friend with a truck to help him move it to his house. David had a nice blue velvet couch.
 selected sentence: David called a friend with a truck to help him move it to his house.
David want(s) to talk to his friend >Motivates> David calls the friend