Anchor: Similarly, one organization's central group was instrumental in acquiring a strong user authentication system to help ensure that network use could be reliably traced to the individual users.
Entailed: One organization's central group was important in acquiring a strong user authentication system.
Contradiction: The central group hasn't helped with anything.
Contradiction: There is not a man cutting hair in the background.
Contradiction: Standing up is a coming-of-age rite.
Contradiction: A couple in heavy coats brave the snow and ice.
Contradiction: Rooms have refigerators.