Text: '  The secret formula for the pendant was closely guarded by its U.S. manufacturers, the Bioelectrical Shield Co., the newspaper said, quoting its British representative as saying he believed that Mrs. Blair had decided to buy one after a recommendation from Hillary Clinton.
Entailment: The U.S. manufacturers guarded the secret formula.
Contradiction: Mrs. Blair had decided to buy one when she caught Tony kneeling under Bill's desk.