Anchor: Eutrophication refers to the increase in the rate of supply of organic matter to an ecosystem and its many undesirable consequences.
Entailed: Eutrophication has unwanted negative effects on the ecosystem.
Contradiction: Eutrophication is an important part of a positively functioning ecosystem.
Contradiction: There are people playing basketball.
Contradiction: People on ice.
Contradiction: A worker in a red hat is fixing the floor.
Contradiction: The man is cleaning.