Assertion: sibling's parent | /r/HasProperty | biological
Facets:
Source sentences:
text: Half siblings may share one biological parent, but marital status of any parent does not affect their relation as half siblings.
text: Full siblings (full brothers or full sisters; or brother and sister) have the same biological parents and are 50% related (full siblings share, on average, 50% of their genes out of those that vary among humans).