Anchor: Sled dogs pull a sled through a snowy forest.
Entailed: Husky dogs work to pull the sled in the snow.
Contradiction: The dogs are taking a break from the hard work forced upon them.
Contradiction: Nothing is pulling
Contradiction: Cats pull a sled through a forest.
Contradiction: Sled dogs are eating dog food.
Contradiction: No dogs are pulling a sled.