Anchor: The risk estimates from the vast majority of the short-term studies include the effects of only one or two-day exposure to air pollution.
Entailed: Risk estimates include effects from 1 or 2 days of pollution exposure. 
Contradiction: The risk estimates the effects of a month of pollution exposure. 
Contradiction: A group of people are smiling.
Contradiction: The errors have been fixed.
Contradiction: It was always obvious that Congress never cared whether aliens in the designated categories got meaningful legal representation or not.
Contradiction: A janitor is cleaning the sidewalk next to the busy street.