Sickness has a sub-event of sleep. Die has a sub-event of sickness. Sleep has a sub-event of die. You cut your hair has a sub-event of they fall asleep. Sleep does not have a sub-event of complaint. Write story has a sub-event of they fall asleep. Sleep has a sub-event of mumble to yourself. Write story does not have a sub-event of mumble to yourself. Sleep does not have a sub-event of you watch movie.
Die has a sub-event of sickness.