Assertion: tree's value | /r/AtLocation | each node
Facets:
Source sentences:
text: Viewed as a whole, a tree data structure is an ordered tree, generally with values attached to each node.
text: Here the trees have no values attached to their nodes (this would just multiply the number of possible trees by an easily determined factor), and trees are distinguished only by their structure; however the left and right child of any node are distinguished (if they are different trees, then interchanging them will produce a tree distinct from the original one).