Anchor: It was ordered by letter, and a postal order was enclosed. 
Entailed: The parcel had been ordered and paid for by mail.
Contradiction: The man had ordered the parcel by telephone, and paid by wire.
Contradiction: they are on Mars
Contradiction: The boy is watching another boy.
Contradiction: a man is taking a photo of a shark while deep sea diving
Contradiction: There are men performing a physical activity.