Anchor: Since 1990, teen-age out-of-wedlock births have actually decreased very slightly.
Entailed: The number of out-of-wedlock teenagers giving birth has slightly decreased since 1990. 
Contradiction: The number of teenage out-of-wedlock births has drastically risen since 1990. 
Contradiction: There are no sharks in the sea-water tanks.
Contradiction: Long ago, most people were against interracial marriage.
Contradiction: His house, which was at the bottom of the steps, was torn down to make room for a shopping center.
Contradiction: I am ok with not wearing any clothes at the camp.