add graph

Author: JPryce-Aklundh

modules/ROOT/images/graph_element_operators.svg

@@ -24,6 +24,8 @@ For functions that return metadata about `NODE` and `RELATIONSHIPS` values, see:
 
 The following graph is used for the examples below:
 
+image::graph_element_operators.svg[width="600",role="middle"]
+
 To recreate the graph, run the following query against an empty Neo4j database:
 
 [source, cypher, role=test-setup]
@@ -123,7 +125,7 @@ RETURN p[$propertyName] AS middleName
 .Result
 [role="queryresult",options="header,footer",cols="1*<m"]
 |===
-| lastName 
+| middleName 
 
 | "Catherine"
 | "David"