Anchor: Specifically, a concentration-response function based on Schwartz et al.
Entailed: The concentration-response function is based on work by Schwartz and colleagues.
Contradiction: The concentration-response function is not related to Schwartz's work.
Contradiction: A boy plays with a ball.
Contradiction: My roommate and I breed cats on the side.  
Contradiction: The Muslim Quarter is not the place to look for ancient sites.
Contradiction: Paul Krugman is a regular columnist on economics.