Assertion: heron's nest | /r/HasProperty | about 15 cm
Facets:
value: above the water surface
type: LOCATION
value: usually
type: TEMPORAL
Source sentences:
text: The nest is usually about 15 cm (6 in) above the water surface and consists of a rough platform of dead stalks and rushes, sometimes with a few twigs mixed in, and lined with bits of coarse grass.