Anchor: Four on-duty firemen talk in front of a firetruck.
Entailed: Four firemen talk in front of a firetruck while on duty.
Contradiction: An ambulance is driving on a dirt road.
Contradiction: Check the back of the book for a useful biking route guide.
Contradiction: Two men are outside
Contradiction: The man is surrounded by people as he plays his guitar.
Contradiction: A bunch of people together.