Assertion: rattlesnake's body | /r/CapableOf | use modified i-beam effect
Facets:
value: for rigidity
type: PURPOSE
Source sentences:
text: Tree snakes, such as Imantodes and Oxybelis, modify this technique to move from branch to branch and have a strongly compressed body that permits surprising lengths of it to be stiffened and extended, using a modified I-beam effect for rigidity.