Anchor: A group of people are standing around a table.
Entailed: The people are standing.
Contradiction: The people are standing around the tree.
Contradiction: There is no gain in offering the discount, no matter what the value of the service is.
Contradiction: His laptop was stuck.
Contradiction: Africans are gathering rice for a meal.
Contradiction: I do not think all of them were students but one might have worked at the university.