Text: Chronic bronchitis is characterized by mucus in the lungs and a persistent wet cough for at least three months a year for several years in a row.
Entailment: A persistent moist cough for a minimum of 3 months a year, for several years in a row, can be a symptom of chronic bronchitis.
Contradiction: The only characterization that appears from chronic bronchitis is a large swelling in the sinuses.