Assertion: mucus | /r/HasProperty | required for healthy body
Facets:
Source sentences:
text: Some mucus is required for a healthy body, but too much of it can be caused because of infections such as common cold or flu, irritation in nose throat or lungs, allergies, gastroesophageal reflux disease, smoking or lung diseases like pneumonia, COPD, lung cancer and cystic fibrosis.