Assertion: monotreme's gland | /r/HasProperty | mammary
Facets:
Source sentences:
text: Both monotremes and marsupials have mammary glands.
text: Monotremes lactate from their mammary glands via openings in their skin, rather than through nipples.
text: Monotremes produce milk for their young but lack nipples; instead, their milk oozes out of ducts of their mammary glands onto specialized patches of skin.