Anchor: These would be large planets rich in hydrogen, ammonia and methane.
Entailed: These are planets abundant in hydrogen, ammonia, and methane.
Contradiction: These cows are rich in methane.
Contradiction: It was way too cold to be wearing short sleeved shirts.  
Contradiction: Four men carry a cross.
Contradiction: A curly-haired man is spilling drinks on the audience
Contradiction: They were all sold.