Anchor: Still, as it happens, the others were not there?
Entailed: Coincidentally the others might not have been there.
Contradiction: As it happened, the others were all there at once.
Contradiction: The skateboarder is playing chess.
Contradiction: A man is using his voice.
Contradiction: The installations are estimated to be done within 15 years.
Contradiction: Yoritomo was not a great person.