[tracker] examples: Update async query example

[Martyn James Russell <mr src gnome org>]

commit 8b6135204c44a0e6e902558c9d2bbcebf4e97547
Author: Martyn Russell <martyn lanedo com>
Date:   Wed Nov 28 16:44:50 2012 +0000

    examples: Update async query example

 examples/introspection/python/query-async.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/examples/introspection/python/query-async.py b/examples/introspection/python/query-async.py
index be5ede5..1077052 100755
--- a/examples/introspection/python/query-async.py
+++ b/examples/introspection/python/query-async.py
@@ -17,7 +17,7 @@ if __name__ == "__main__":
 
     # The connection can be requested asynchronously
     conn = Tracker.SparqlConnection.get (None)
-    conn.query_async ("SELECT ?u WHERE { ?u a nie:InformationElement. }",
+    conn.query_async ("SELECT nie:url(?u) WHERE { ?u a nfo:FileDataObject }",
                       None,
                       results_ready_cb,
                       loop)