Anchor: Keeping alive a baby born in the 22 nd week costs several hundred thousand dollars and usually fails, regardless of the effort.
Entailed: It's expensive to keep alive a baby born in the 22nd week.
Contradiction: It's very cheap to keep alive a baby born in the 22nd week.
Contradiction: A boy sings.
Contradiction: They smiled at each other.
Contradiction: Byzantium was a small town of little historical importance.
Contradiction: A large group of youths spent time on Graffiti-covered wall.