Anchor: This put Las Vegas on the map and was one of the crucial turning points of its history.
Entailed: This was a major event for Las Vegas.
Contradiction: Las Vegas was already well-known before this event.
Contradiction: I'm done discussing any topic at all. 
Contradiction: The web site collection now includes the book The Hard Way.
Contradiction: Pfizer has yet to rethink their charter, processes, products, and services, and has no plans to do so in the future.
Contradiction: There are two canines.