Anchor: While the letter mail monopoly preceded the introduction of delivery service, the fixed costs associated with delivery underlie the two modern justifications for the letter monopoly.
Entailed: The delivery service was a monopoly long before modern times.
Contradiction: They did not think the mail service was ever a monopoly.
Contradiction: A girl is playing with dolls in her attic.
Contradiction: A person is riding a bicycle.
Contradiction: Three gymnasts compete in a field.
Contradiction: It was the main route for the Roman's attack on Gaul and an important part of Lyon's commercial wealth.