+import "StandardLibrary"
+import "Minigraph"
+
+main = withGraph do
+ r = map resource ["r0", "r1"]
+ sort $ map uriOf $ select ?x where
+ Statement ?y (r!0) ?x
+ Statement ?x (r!1) ?y
+--
+6:24-8:30: Failed to compile the query.
+Unsolved variables: ?x, ?y
\ No newline at end of file