Anchor: Most of the studies examine differences in wages of risky occupations, using a wage-hedonic approach.
Entailed: Wages of risky occupations can be examined using a wage-hedonic approach.
Contradiction: Risky occupations all have the same wages. 
Contradiction: The skateboarder is skating in an empty swimming pool.
Contradiction: Some cops in full SWAT gear are approching a crowd quickly
Contradiction: A child walks across the desert.
Contradiction: Two people are performing music.