Text: On the other hand, Mrs. Cavendish believed that the slip of paper to which her mother-in-law clung so tenaciously was a written proof of her own husband's infidelity.
Entailment: Mrs. Cavendish's mother-in-law had been holding on to a slip of paper.
Contradiction: Mrs. Cavendish's mother-in-law had died when her son was a small child.