story: Pat had a song stuck in her head all day. She tried to ignore it but it wouldn't go away. When her mind when blank she heard the song. She tried to listen to the radio until the song was flushed out. After a few country songs she forgot all about the first one.
 selected sentence: When her mind when blank she heard the song.
Pat hears the song when her mind is blank >Causes/Enables> Pat listens to the radio to flush out the song