Assertion: pigeon's bird | /r/HasProperty | only
Facets:
Source sentences:
text: New Zealanders clearly love their native pigeon which, at 50 centimeters (19.7 in) long, is the only bird big enough to eat and disperse the large seeds of several plant species.
text: The Seneca people believed that a white pigeon was the chief of the passenger pigeon colony, and that a Council of Birds had decided that the pigeons had to give their bodies to the Seneca because they were the only birds that nested in colonies.
text: In the past, the pigeon was the only bird that the Jews accepted as a sacrifice for the purification of the mother after the child’s birth.
text: Pigeons are the only bird in the world that do not have to lift their head to swallow.