Anchor: For example, a hypothetical study conducted in New York and one conducted in Seattle may report different C-R functions for the relationship between PM and mortality, in part because of differences between these two study populations (e.g.
Entailed: A study based in Seattle may yield different results than that in New York due to the difference in demographics.
Contradiction: Studies in different regions will always give the same results.
Contradiction: An SCR must always be located in the building's basement.
Contradiction: A girl is taking a break
Contradiction: I know exactly what's wrong here. 
Contradiction: Someone is holding a ball over her head.