Anchor: How it  Melatonin is a natural hormone (produced by the pineal gland) that seems to regulate your internal clock.
Entailed: Melatonin is naturally produced by the pineal gland.
Contradiction: Melatonin is an artificial hormone produced in a lab.
Contradiction: A helicopter hovers over a field.
Contradiction: There are bike riders where others are gathered.
Contradiction: A man is cutting grass.
Contradiction: He prayed to any deity that would hear him.