Anchor: Before 1970, however, evaluation case studies were similar to research case studies.
Entailed: Prior to 1970, evaluation case studies were similar to research case studies.
Contradiction: During 1970, evaluation case studies were similar to research case studies.
Contradiction: The street is in the United States.
Contradiction: The sun creates problems for six men looking in its direction.
Contradiction: There is a large crowd in the stadium.
Contradiction: A man climbing a ladder.