Anchor: Two men do karate- one strikes sideways with his arm, while the other kicks straight out in front of him.
Entailed: There are two men doing karate, one striking with his arm, the other kicking.
Contradiction: There are three women doing karaoke singing.
Contradiction: Nobody has pierced ears.
Contradiction: Very possible.
Contradiction: Drew was relaxed. 
Contradiction: The site can have either a single unit, or hold multiple units.