Assertion: node's key | /r/CapableOf | move up key
Facets:
value: to the parent
type: TRANSITIVE-OBJECT
Source sentences:
text: If a sibling on either side of this node is a 3-node or a 4-node (thus having more than 1 key), perform a rotation with that sibling: The key from the other sibling closest to this node moves up to the parent key that overlooks the two nodes.