Anchor: A college class is in session with students in attendance.
Entailed: Students are attending a college class.
Contradiction: The students are leaving the classroom.
Contradiction: A woman drowns in a natural water source.
Contradiction: During Venetian times, they brimmed with crops and grew fodder for livestock, but today, many lie overgrown and unused.
Contradiction: None of the hardcovers ordered by chains were returned. 
Contradiction: Lyndon LaRouche will get married.