Assertion: idiopathic pulmonary fibrosis | /r/CapableOf | involve thickening of tissues
Facets:
value: about pulmonary fibrosis
type: OTHER
value: without a known cause
type: OTHER
Source sentences:
text: About Pulmonary Fibrosis: Idiopathic pulmonary fibrosis involves scarring or thickening of tissues deep in the lung without a known cause.