Assertion: umbilical cord's vessel | /r/HasProperty | one vein
Facets:
Source sentences:
text: Occasionally, only two vessels (one vein and one artery) are present in the umbilical cord.
text: Occasionally, only two vessels (one vein and one artery) are present in the umbilical cord.
text: Occasionally, only two vessels (one vein and one artery) are present in the umbilical cord.
text: Changes occur to form the de ﬁ nitive cord, which contains three umbilical vessels, namely, “ one vein and two
text: Occasionally, only two vessels (one vein and one artery) are present in the umbilical cord.