Anchor: Two men are working on a circular window by standing on chairs.
Entailed: Two men are standing on chairs and working.
Contradiction: Two men decided to call out of work today.
Contradiction: A dance group falls down.
Contradiction: A lot of the equipment is specific to the site or to what the project requires. 
Contradiction: No one could be annoyed with what has happened
Contradiction: A man is putting meat in a bag.