Anchor: To fill this void, many mailers measure the service their own mail receives.
Entailed: Mailers receive mail which they measure to fill a void.
Contradiction: Mailers don't have to fill a void, so they don't examine their own mail's service.
Contradiction: A lot of people are wandering around a new city.
Contradiction: Two people are outside.
Contradiction: THe man is dancing for a crowd
Contradiction: Our parents were brother and sister.