Anchor: The boat-man is working on an uncompleted boat.
Entailed: A person is constructing his boat.
Contradiction: A boat mechanic is watching TV.
Contradiction: A group of people is in line at the cafeteria.
Contradiction: This type of holly does not have to be trimmed in a boxy style. 
Contradiction: A group of men start fighting and a leg is broken.
Contradiction: The Prado owns more than 9,000 paintings.