Assertion: embryo's cell | /r/AtLocation | top of the yolk
Facets:
Source sentences:
text: In some only a few cells grow on top of the yolk , in the lower right the blood vessels surround the yolk and in the upper left the black eyes are visible.
text: In some only a few cells grow on top of the yolk , in the lower right the blood vessels surround the yolk and in the upper left the black eyes are visible.