Anchor: A man in a red shirt plays guitar in a park.
Entailed: red shirt man enjoys music.
Contradiction: A man lying in a green park
Contradiction: The Hoover Dam's dedication in 1935 was only attended by public officials.
Contradiction:  Two girls are in ballerina tutus performing ballet.
Contradiction: We spend more on wages than profits.
Contradiction: IA and IB are reports, Case Studies