Anchor: Consider  Only 13 nations participated in 1896, but there were 172 in 1992.
Entailed: 13 nations were involved in 1896, while 172 did in 1992.
Contradiction: No more nations have joined since 1896.
Contradiction: the line is short
Contradiction: Some people are getting wet.
Contradiction: The group of actors performs on the street corner.
Contradiction: A beautiful, young couple ready to dance.