Anchor: A water polo event takes place with a yellow ball in a swimming pool.
Entailed: Water polo takes place in a pool.
Contradiction: Water polo happens in a field of grass.
Contradiction: No one is rollerskating.
Contradiction: There was a contest about scandal trivia.
Contradiction: Two boys play street hockey.
Contradiction: The architectural wonder that dates back to the 17th-century features a full set of beautifully furnished domestic rooms.