Anchor: It could be the first step toward multi-center studies.
Entailed: Multi center studies could happen in the future.
Contradiction: It is now almost impossible for multi center studies to take place.
Contradiction: The woman is tossing a frisbee.
Contradiction: It's possible they have children in common.
Contradiction: It had been expected of them that they would stand up to Helms.
Contradiction: a man outside