Anchor: Jon caught the spear, guided the tip into the earth, and stomped the shaft.
Entailed: Jon managed to stop a spear from stabbing him.
Contradiction: Jon was caught by a spear, killing him.
Contradiction: The people are at a museum looking at American folk art.
Contradiction: Someone put an arm around his neck. 
Contradiction: The quarterback is Sammy Smith.
Contradiction: A Salvation Army worker collecting a donation.