Assertion: tumor's type | /r/HasProperty | described by dr. james ewing
Facets:
value: in 1921
type: TEMPORAL
Source sentences:
text: This type of tumor was first described by Dr. James Ewing in 1921, who found it was different from the more common bone tumor, osteosarcoma.
text: This type of tumor was first described by Dr. James Ewing in 1921, who found it was different from the more common bone tumor, osteosarcoma.