Anchor: She urinated, a sign that she was ready.
Entailed: She took a pee and that signaled that she was now ready. 
Contradiction: The animal was not able to urinate and this caused a problem.
Contradiction: A man is riding a zebra.
Contradiction: People look at computer accessories
Contradiction: A toddler is laying in the grass.
Contradiction: Here we have always ground our own.