Text: Movie theaters have a certain amount of monopoly power (on a given night, a given moviegoer is likely to have a strong preference for a particular movie at a particular theater), and they price discriminate by offering discounts to senior citizens (which is equivalent to discriminating against everybody under the age of 65).
Entailment: Movie theaters price discriminate by offering discounts to senior citizens.
Contradiction: Movie theaters charge an increased price for senior citizens.