Anchor: Three people are in an alley with a dumpster, one skateboarding over the dumpster while the other two look on.
Entailed: People looking on.
Contradiction: The dumpster is in the middle of the street.
Contradiction: There are people in a forest.
Contradiction: Two people are in an alley with a dumpster.
Contradiction: Nobody is skateboarding.
Contradiction: Three people are driving their cars through the countryside.