Anchor: Two guys, one wearing gray and one wearing black, sweep of a set of stairs.
Entailed: Two guys are sweeping stairs.
Contradiction: Two men are playing the banjo at a hoedown.
Contradiction: those two dogs are husband and wife
Contradiction: The swine flu vaccine was created in 1978.
Contradiction: I fully support this exceptional idea and will vote for it.
Contradiction: A person  in an orange vest standing in a field.