Anchor: A dog chases a tennis ball in a concrete courtyard.
Entailed: A dog chases a ball.
Contradiction: A dog chases a rat.
Contradiction: You don't have a credit card. 
Contradiction: She will get in your way if you try to read a book or use the computer.
Contradiction: Jon walked right past the odd looking scout without even a glimpse. 
Contradiction: Kids do not see their moms.