Anchor: A person is riding a dirt bike in a race on a dirt track.
Entailed: A person bike races on a dirt track.
Contradiction: People ride donkeys at the Grand Canyon.
Contradiction: two men are sitting on the steps
Contradiction: There is concern in the US whether the noshift own-price elasticty of workshared volume is greater than basic volume.
Contradiction: There was none that were unique.
Contradiction: The structure of stock options have been the focus of a lot of attention.