Assertion: dermis's gland | /r/HasProperty | substance
Facets:
Source sentences:
text: The follicle also gives rise to sebaceous glands that produce sebum, a substance that lubricates the hair.
text: The sebaceous glands of a human fetus in utero secrete a substance called vernix caseosa, a “waxy” or “cheesy” white substance coating the skin of newborns.