Assertion: sacrum | /r/HasProperty | the most common site
Facets:
value: in the spine
type: LOCATION
value: with respect to spinal involvement
type: OTHER
Source sentences:
text: Only 7% of giant cell tumors involve the spine, but with respect to spinal involvement, the sacrum is the most common site.
text: Primary Ewing sarcoma of the spine is uncommon, but the sacrum is the most common site of origin in the spine.