Anchor: Four guys playing frisbee in an open grassy field with several people and tents in the background.
Entailed: The guys are playing outside.
Contradiction: The field is muddy with no greenery.
Contradiction: There is an abundance of instructors and literature. 
Contradiction: He couldn't hear but a chance word here and there.
Contradiction: A little girl chases butterflies through a field.
Contradiction: We need a fairer tax revenue system.