Anchor: A group of long-distance runners compete in a competition.
Entailed: A group of runners are competeing.
Contradiction: A group of runners are being chased by the police.
Contradiction: There is a woman taking a picture.
Contradiction: Four firemen talk in front of a firetruck while on duty.
Contradiction: I don't want to use styrofoam at all.
Contradiction: People eating cake inside.