Anchor: Also, there would be concern if monopoly power allowed certain products to have excessive prices.
Entailed: Excessive prices would result in concerns.
Contradiction: There are no concerns with monopoly power.
Contradiction: At maximum no idea of it.
Contradiction: There are English-language performances, but the two leading local troupes perform in Cantonese. 
Contradiction: There is no acid rain.
Contradiction: one man is singing while another plays a guitar