Anchor: One smiling person wearing a black sleeveless shirt is hammering a nail into a piece of wood.
Entailed: The person hammering the nail is smiling.
Contradiction: The man is frowning.
Contradiction: You have a very clear understanding of the situation, but you must stay inside today. 
Contradiction: people speaking
Contradiction: The person requested we give them more time to prepare.
Contradiction: A man is balancing a metal ball.