Assertion: turtle's head | /r/HasProperty | withdrawn into the shell
Facets:
value: by pulling it
type: MANNER
Source sentences:
text: Also, the neck vertebrae are modified to let the head be withdrawn into the shell, either by pulling it straight back into the shell or while the neck makes an S-shape or else by laying it to the side under the overhanging lip of the carapace (for example the sideneck turtles).