Anchor: Four people in black shirts giving a presentation to a room full of people using a big projector image on the wall.
Entailed: Four people give a presentation to a full room of people.
Contradiction: four birds fly south for the winter
Contradiction: There is only one person present..
Contradiction: A room full of people are running around screaming.
Contradiction: Several people are giving a presentation to an empty room
Contradiction: Four people are in white shirts.