Anchor: A child swims in a stream, whilst other children wait to jump off a rock.
Entailed: A child swims in a stream
Contradiction: A child sleeps.
Contradiction: A woman drills a hole.
Contradiction: You must pay a fee to send mail abroad from the U.S.
Contradiction: The man's clothes were all tie-dyed. 
Contradiction: GAO's work is not limited to social security threats.