Assertion: bone marrow's blood cell | /r/HasProperty | white
Facets:
Source sentences:
text: It also contains stem cells that can develop into red blood cells, white blood cells or platelets.
text: As a whole, bone marrow is a complex tissue comprised of red and white blood cells, their precursors, and a group of cells consisting of fibroblasts, reticulocytes, adipocytes, and endothelial cells which formulate a connective tissue network called "stroma".