Anchor: A student referendum on notification at the University of Illinois produced the highest turnout for a student election in 10  More than 80 percent of students voted against it.
Entailed: The student referendum produced the biggest student election turnout.
Contradiction: The student referendum produced the smallest voter turnout ever. 
Contradiction: The friends are having fun in gym class.
Contradiction: They are swimming.
Contradiction: A child is touching a manhole grate.
Contradiction: Humans at an exhibit.