Anchor: We need to further examine and refine alcohol-screening questionnaires in the ED.
Entailed: We need to study what questions we use to screen for alcohol problems in the ED.
Contradiction: We need to study what we ask about seat belt use in the ED.
Contradiction: The headmistress still works at the school. 
Contradiction: There are two animals in this picture.
Contradiction: Nothing is tax-free.
Contradiction: A man is sitting next to the harbor.