Assertion: tumor antigen | /r/HasProperty | classified into two categories
Facets:
value: broadly
type: MANNER
Source sentences:
text: Initially tumor antigens were broadly classified into two categories based on their pattern of expression: Tumor-Specific Antigens (TSA), which are present only on tumor cells and not on any other cell and Tumor-Associated Antigens (TAA), which are present on some tumor cells and also some normal cells.