Anchor: Something was clutched around his throat, almost choking him.
Entailed: He almost chocked because of something pushing against his throat.
Contradiction: For the first time, he felt completely safe and comfortable.
Contradiction: I do not know any predators.
Contradiction: A player is tackled at a sporting event.
Contradiction: I have no idea what a publicity stunt is. 
Contradiction: A person is in the city.