Assertion: brain tumor's type | /r/HasProperty | ependymoma
Facets:
Source sentences:
text: The most common types of pediatric tumors are medulloblastomas, low-grade astrocytomas (pilocytic), ependymomas, craniopharyngiomas and brainstem gliomas.
text: The two major types of glial tumors are astrocytomas and ependymomas.