Anchor: They had to hunch to get in the first tunnels but deep within they rose into high square caves and finally into the open mines.
Entailed: They were traveling through the mines.
Contradiction: They decided to stay in the open fields.
Contradiction: Then our chances to catch him will increase greatly! 
Contradiction: There were mixed reviews on Helen Hunt's performance, was she down to earth or banal?
Contradiction: Two friends are at a cafe.
Contradiction: A young man performing a skateboard trick.