Anchor: - Dewatering system (settling tanks/vessels, hydrocyclones, and/or vacuum filters) - Stacking equipment 
Entailed: Dewatering systems consist of settling tanks, hydrocyclones and possibly vacuum filters.
Contradiction: Dewatering systems operate without the need of settling tanks.
Contradiction: Two men sit and argue.
Contradiction: Some people are wearing certain colors on a field.
Contradiction: A man is standing on the street and playing a harmonica.
Contradiction: A woman is playing chess.