Anchor: Therefore, he took the risk, the great risk, of coming in here. 
Entailed: It was risky for him to come here.
Contradiction: It was safe for him to come here.
Contradiction: Lister's experiments failed miserably.
Contradiction: Many people are outside at an event.
Contradiction: Figure 6-4 shows only some demand from the Clear Skies Act.
Contradiction: A tiny person ascends.