Assertion: trumpeter swan's foot | /r/HasProperty | 6 to 9 meter
Facets:
Source sentences:
text: The nest is often surrounded by a 20 to 30 foot (6 to 9 meter) ditch - usually filled with water to make it more difficult for mammalian predators to access the nest.
text: The nests may reach a diameter of up to 11.5 feet (1 to 3.5 meter) and is often surrounded by a 20 to 30 foot (6 to 9 meter) ditch.