Assertion: emu's tracheal pouch | /r/HasProperty | part of its windpipe
Facets:
Source sentences:
text: The emu makes its deep guttural sounds by vibrating a 30cm long thin-walled tracheal pouch which is part of its windpipe.
text: The emu makes a deep-throated 'drumming' sound by using its tracheal pouch, which is part of its windpipe.
text: The emu makes its deep guttural sounds by vibrating a 30cm long thin-walled tracheal pouch which is part of its windpipe.