Anchor: A notice of proposed rulemaking was published on February 3, 1995.
Entailed: On February 3, 1995, a proposed rulemaking was published.
Contradiction: They forgot to publish a notice of proposed rulemaking.
Contradiction: A large group is protesting unfair working conditions.
Contradiction: I didn't know. 
Contradiction: The boy is in school.
Contradiction: An onlooker is sitting.