Anchor: According to the results of three recent surveys, the private sector commonly allows its employees to retain for personal use frequent flyer miles received on business travel.
Entailed: There were three surveys conducted recently.
Contradiction: There were exactly two surveys conducted recently.
Contradiction: There is nothing inside the tower.
Contradiction: People have gathered to get ready to gather later.
Contradiction: She did not understand what he was saying. 
Contradiction: A woman is streching.