Anchor: To overcome this obstacle, most of the organizations required members to sign confidentiality or informationsharing agreements.
Entailed: Members may be required to informationsharing agreements.
Contradiction: There's no reason for organizations to have members to sign confidentiality or informationsharing agreements.
Contradiction: Johnny was frowning the whole time.
Contradiction: Three girls are playing a sport.
Contradiction: The man continued to scream long after the claw was ripped away. 
Contradiction: The player is an athlete.