Anchor: The severity level of an average pollution-related case of CB (relative to that of the case described by Viscusi, et al.).
Entailed: Pollution related case of CB and it's severity level.
Contradiction: All pollution-related cases, especially those regarding CB, are relative to no other cases. 
Contradiction: That's the best.
Contradiction: A boy is watching television.
Contradiction: Several people are ordering food a la carte.
Contradiction: Our family vacations typically involved bad tension and many arguments.