Anchor: We're offering a convenient purchase option in installments of 20 zloty a month, or every other month.
Entailed: There is purchase options for something that are available either monthly or every other month.
Contradiction: All the money has to be paid up front.
Contradiction: They want to give it thirty years, the same amount of time between 1922 and 1925.
Contradiction: Two ladies are cleaning.
Contradiction: The rule came into immediate effect.
Contradiction: Someone is about to eat.