Anchor: A man wearing a tank top is positioning a piece of metal over his head.
Entailed: A man is holding a piece of metal.
Contradiction: A man is serving food to a customer.
Contradiction: I think they will select me because they think I am not biased.  
Contradiction: The skater is on the rail.
Contradiction: Nobody is standing
Contradiction: A boy looks at the sky with a telescope.