Anchor: Two men sit at work computers and work at night.
Entailed: Two men at work.
Contradiction: Two women at work on the phone.
Contradiction: There are no guitars in Puerto Rico. 
Contradiction: A person of Asian descent is playing an instrument.
Contradiction: Due to its relatively low worth, Bergamo was overlooked by the French, Spanish, and Venetians.
Contradiction: Two people are looking out a window.