Two older men with backpacks sit at a bus station .
Two older men with backpacks sit at the airport .
Two older men with backpacks sit at a bus station.
Two older men with backpacks sit at the airport.
The information that contradicts is the location. In Sentence 1, the men are at a bus station, in sentence 2, they are at an airport.
The information that contradicts is the location . In Sentence 1 , the men are at a bus station , in sentence 2 , they are at an airport .