Assertion: melanoma's cancer | /r/CapableOf | begin in cell
Facets:
value: in the retina
type: LOCATION
value: the building blocks that make
type: OTHER
Source sentences:
text: Cancer begins in cells, the building blocks that make up tissues.
text: Retinoblastoma, a cancer that starts in cells in the retina (the light-sensing cells in the back of the eye)
text: In skin cancer the cancer begins in cells that make up the skin.