Assertion: owl's egg | /r/HasProperty | incubated for 30 days
Facets:
Source sentences:
text: The eggs are incubated for 30 days.
text: The eggs are incubated for about 30 days.
text: After the eggs have been incubated for around 30 days, the frogmouth chicks hatch out and are covered in downy feathers.
text: The eggs are incubated for 30 days.