Anchor: Two boys in yellow shirts writing into books.
Entailed: Two boys write in books.
Contradiction: Two boys throw a ball.
Contradiction: Exxon is one of the most popular stations here.
Contradiction: I put the coffee down on the hall table because I was told there was a friend at the hall door. 
Contradiction: i've lived in Maryland my entire life
Contradiction: The two kids are physically active.