Anchor: For the organizations that strictly controlled their membership or the number of members, developing and maintaining their membership base was a formidable challenge.
Entailed: Organizations that strictly controlled their membership was a formidable challenge.
Contradiction: Organizations that strictly controlled their membership wasn't a challenge.
Contradiction: A black dog sleeping by a fire.
Contradiction: Do you listen to rap music, it seems very popular today.
Contradiction: The analysis estimates that society will become dumber as a result.
Contradiction: The EU is concerned about the Greek monuments.