Anchor: Menstruation typically occurs on the 28 day lunar cycle.
Entailed: Women experience menstruation on a typical twenty eight day lunar cycle. 
Contradiction: Menstruation is random and does not follow any sort of pattern.
Contradiction: A group of people are flying a kite.
Contradiction: A child with an umbrella.
Contradiction: The skateboard has no wheels.
Contradiction: The young women are making something.