Assertion: tuatara's crest | /r/CapableOf | run down its back
Facets:
Source sentences:
text: A crest of floppy white spikes runs down its back.
text: Spiny crests run down the neck and the back.
text: A low crest runs along its back, eventually turning into stout, conical pegs on the thick, muscular tail.
text: Males have a crest that run all the way down their back.