Assertion: pigeon's crop milk | /r/CapableOf | feed to young
Facets:
Source sentences:
text: Unlike most birds, both sexes of doves and pigeons produce "crop milk" to feed to their young, secreted by a sloughing of fluid-filled cells from the lining of the crop.
text: Unlike most birds, both sexes of pigeons and doves produce “crop milk” to feed to their young, secreted by a sloughing of fluid-filled cells from the lining of the crop.