Anchor: There are a dozen construction workers unloading the materials from the truck.
Entailed: Workers are unloading something from the truck.
Contradiction: A dozen construction workers are stuck in traffic on a bridge.
Contradiction: I would never buy an Amiga desktop computer. . 
Contradiction: one person sits while three stand near a body of water.
Contradiction: A man sits on a machine.
Contradiction: She was furious.