Anchor: How do we know when the president had done a good job?
Entailed: How do we know when the president does a good job?
Contradiction: How to we know the president is doing a bad job
Contradiction: A old man is using a walker near a sidewalk.
Contradiction: Someone is rock climbing.
Contradiction: Two girls on bicycles ride around a cul-de-sac.
Contradiction: There is a white napkin near the mouse.