Assertion: tumor | /r/HasProperty | er
Facets:
Source sentences:
text: This type includes tumors that are ER positive, PR negative and HER2 positive.
text: This type includes tumors that are ER positive, PR negative and HER2 positive.
text: This type includes tumors that are ER negative and PR negative, but HER2 positive.
text: This type includes tumors that are ER negative and PR negative, but HER2 positive.
text: This type, which is also called triple-negative breast cancer, includes tumors that are ER negative, PR negative and HER2 negative.