Assertion: tumor's change | /r/HasProperty | mutation
Facets:
Source sentences:
text: Cancer is caused by harmful changes (mutations) in genes.
text: An abnormal change in a gene is called a mutation.
text: The chain of events inside cells that leads to retinoblastoma is complex, but it almost always starts with a change (mutation) in the RB1 gene.
text: Cancer is caused by changes (mutations) to the DNA within cells.
text: In general, colon cancer begins when healthy cells in the colon develop changes (mutations) in their DNA.