Anchor: A person, alone, is jumping in the ocean, a large distance away from the shore.
Entailed: A person is going to swim solo in the ocean
Contradiction: The person is standing on the shore
Contradiction: They were chatting outside of Burger King.
Contradiction: "Precisely," said Tuppence. 
Contradiction: Lacking Spanish treasures, it doesn't deserve high priority on any visitor's agenda.
Contradiction: He was a hard worker and a smart man