Add a short SceneGraph interface demo

Author: AngledLuffa

demo/scenegraph.py

@@ -0,0 +1,15 @@
+"""
+Very short demo for the SceneGraph interface in the CoreNLP server
+
+Requires CoreNLP >= 4.5.5, Stanza >= 1.5.1
+"""
+
+from stanza.server import CoreNLPClient
+
+# start_server=None is if you have the server running in another process on the same host
+# you can start it with whatever normal options CoreNLPClient has
+with CoreNLPClient(start_server=None) as client:
+    result = client.scenegraph("Jennifer's antennae are on her head.")
+    print(result)
+
+