Assertion: lung cancer's tumor | /r/HasProperty | benign
Facets:
Source sentences:
text: The buildup of extra cells causes tumors, which are either benign or malignant.
text: Benign tumors : Benign lung tumors such as hamartomas (the most common benign lung tumor)
text: A tumor can be cancerous or benign.
text: A tumor can be cancerous or benign.