story: I just made myself some popcorn as a snack. The doorbell rang as soon as I sat down to eat. It was my mailman delivering a package. When I came back my popcorn bowl was empty and my son was laughing. I guess I have to make more popcorn if I want my snack.
 selected sentence: It was my mailman delivering a package.
The doorbell rang >Causes/Enables> It was my mailman