Assertion: cephalopod's arm | /r/HasProperty | lit in this case
Facets:
Source sentences:
text: A 2014 study on the freshwater crayfish Procambarus clarkii tested their responses in a fear paradigm, the elevated plus maze in which animals choose to walk on an elevated cross which offers both aversive and preferable conditions (in this case, two arms were lit and two were dark).