Assertion: breast's nipple | /r/HasProperty | small projection of skin
Facets:
value: in mammals
type: OTHER
value: for 15–20 lactiferous ducts
type: TEMPORAL
Source sentences:
text: In mammals, a nipple (also called mammary papilla or teat) is a small projection of skin containing the outlets for 15–20 lactiferous ducts arranged cylindrically around the tip.