Anchor: Indian tribes including the Siboney from Central and South America had lived on the island since at least 1000 b.c.
Entailed: The Siboney is an Indian tribe.
Contradiction: The Siboney is not an Indian tribe.
Contradiction: The materials are all available to read on the internet.
Contradiction: Someone is selling something.
Contradiction: Kitchell is a bandito who would never dare to steal from the army. 
Contradiction: An old man sculpts a large bowl on a pottery wheel.