Assertion: pigeon's bird | /r/HasProperty | released over year
Facets:
Source sentences:
text: Many domestic birds have escaped or been released over the years, and have given rise to the feral pigeon.
text: Many domestic birds have got lost, escaped or been released over the years, and have given rise to feral pigeons.
text: Many domestic birds have escaped or been released over the years, and have given rise to the feral pigeon.