Anchor: This would not be a good time to get mugged.
Entailed: If there was a good time to be mugged, this was not it. 
Contradiction: This was the perfect time to get mugged.
Contradiction: I went to that city last year.
Contradiction: Six km further gets you to the Valencia-Alicante highway.
Contradiction: We didn't really have tests or homework when I was in school.
Contradiction: There aren't enough applicants to fill all our openings.