Assertion: octopus's brain | /r/HasProperty | a cluster of nerve cells
Facets:
Source sentences:
text: In addition, there is a small brain in each of their eight arms — a cluster of nerve cells that biologists say controls movement.
text: These small brains are clusters of nerve cells that allow each arm to work independently of each other.
text: In addition, there is a small brain in each of their eight arms — a cluster of nerve cells that biologists say controls movement.