diff --git a/show/dance2015/sessions/curvecalc/default.n3 b/show/dance2015/sessions/curvecalc/default.n3
--- a/show/dance2015/sessions/curvecalc/default.n3
+++ b/show/dance2015/sessions/curvecalc/default.n3
@@ -1,8 +1,2 @@
-@prefix ns1: <http://light9.bigasterisk.com/> .
-@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
-@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
-@prefix xml: <http://www.w3.org/XML/1998/namespace> .
-@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
 
-<http://light9.bigasterisk.com/show/dance2015/sessions/curvecalc/default> ns1:currentSong <http://light9.bigasterisk.com/show/dance2015/song1> .