Anchor: I am not keeping back facts. 
Entailed: I am not hold back facts.
Contradiction: I am keeping back facts.
Contradiction: A guy is walking by himself in the middle of the street.
Contradiction: Rogier van der Weyden painted a portrait of Philippe le Bon, the third great duke.
Contradiction: The children are at school.
Contradiction: I don't know anything and I am not benefiting from anything.