Assertion: caecilian | /r/HasProperty | gymnophiona
Facets:
Source sentences:
text: Among amphibians, the sirens (order Trachystomata), salamanders (Caudata), and caecilians (Gymnophiona) are silent or nearly so, but the frogs (Anura) are highly vocal, producing species-specific sounds by moving air between the mouth and lungs past vocal chords in the windpipe (trachea).