Anchor: A man in a white shirt is plowing a field with two mules.
Entailed: The mules are working.
Contradiction: a horse master is training his mules to take the bit
Contradiction: An older male in a blue shirt plowing a field with two cows.
Contradiction: The horses are pulling the plow.
Contradiction: The man is inside watching TV.
Contradiction: The field is frozen solid.