Assertion: node's sibling | /r/CapableOf | lose one node
Facets:
Source sentences:
text: Replace the separator in the parent with the first element of the right sibling (right sibling loses one node but still has at least the minimum number of elements)
text: Replace the separator in the parent with the last element of the left sibling (left sibling loses one node but still has at least the minimum number of elements)