Anchor: a rollerblader grinds a rail.
Entailed: There is a rail.
Contradiction: The rollerblader is sitting down.
Contradiction: Dai-Siu is played with two decks of cards, including the jokers.
Contradiction: A lot of people are walking around Tiananmen Square.
Contradiction: The guys are playing baseball on the field
Contradiction: Group of people painting.