Anchor: If the singing in school of military songs such as  Come, Foes, Come!  
Entailed: They sang military songs in school.
Contradiction: They were not allowed to sing in school.
Contradiction: A rich man plays with a luxurious chess set.
Contradiction: The country is easy to navigate around as it is carved out of the western sixth of the Iberian peninsula.
Contradiction: The people are riding camels.
Contradiction: Several musicians are playing music.