Anchor: Physicians frequently ask about tetanus immunizations even though almost none have ever seen a case of tetanus.
Entailed: Although many have never seen a tetanus case, physicians still often ask about tetanus immunizations. 
Contradiction: Physicians never ask about tetanus immunizations. 
Contradiction: A single colored dog is chasing a rabbit.
Contradiction: The women are inside, one sits and reads while the other stands and drinks.
Contradiction: The women are swimming in a lake.
Contradiction: Humans are inside.