Anchor: Three young men sit on rocks at the top of a mountian.
Entailed: Three men sit on a mountain.
Contradiction: The young women sit on top of a mountain.
Contradiction: A man and girl sit on a bench.
Contradiction: Should an alternative to electronic signatures me used, or is it risky?
Contradiction: We did not walk for anywhere near thirty minutes.  
Contradiction: He spoke about changing what is important.