Anchor: Participants authored twenty papers that were distributed at the conference.
Entailed: Twenty papers were presented to the conference participants.
Contradiction: None of the distributed papers were authored by participants. 
Contradiction: In biotechnology intellectual-property laws are very detailed and adequate for the job at hand.
Contradiction: The chairman of the banks goal is to have all business units to have a positive rating in both categories.
Contradiction: A girl is painting her nails inside her room.
Contradiction: The bicycle rider is outside.