Assertion: echidna's gland | /r/HasProperty | special
Facets:
Source sentences:
text: Instead of nipples like other mammals, echidnas have special glands in their pouches that produce milk.
text: Instead, female echidnas have special glands in their pouches called milk patches that secrete milk, which the puggle laps up.
text: Instead, female echidnas are equipped with special glands called milk patches.