Anchor: Electricity generators must hold an allowance for each ton of pollution they emit - one ton, one allowance.
Entailed: Pollution is measured using units, where one unit is equal to one allowance.
Contradiction: Two tons are equal to one allowance.
Contradiction: A group of men swimming in a lake.
Contradiction: Those girls will never be the same.
Contradiction: It is for crying.
Contradiction: You will need to provide refreshments that you made yourself.