Anchor: Boys in uniform wait outside a building.
Entailed: The police men were outside the store.
Contradiction: The girls wanted tea and cookies.
Contradiction: Prospectors stayed in their local lands because they wanted to mine silver, not gold.
Contradiction: A piece of wood is being worked upon.
Contradiction: I haven't heard of any problems regarding that when they first tried that. 
Contradiction: Two guys wearing black taking pictures.