Assertion: primary lung cancer | /r/AtLocation | lung
Facets:
Source sentences:
text: Primary lung cancer, which originates in the lungs, is grouped into two broad categories: small cell carcinoma (about 15 percent of cases) and non-small cell carcinoma (about 85 percent).
text: Primary lung cancer originates in the lungs, while secondary lung cancer starts somewhere else in the body, before spreading to the lungs - they are considered different types of cancers.