diff --git a/examples/cosmas17.json b/examples/cosmas17.json
index 32e073b..61333fd 100644
--- a/examples/cosmas17.json
+++ b/examples/cosmas17.json
@@ -2,20 +2,30 @@
   "context" : "http://ids-mannheim.de/ns/KorAP/json-ld/v0.1/context.jsonld",
   "query" : {
     "@type" : "korap:group",
-    "operation" : "operation:position",
-    "frame" : "frame:startswith",
+    "operation" : "operation:submatch",
+    "classRef" : [ 1 ],
     "operands" : [ {
-      "@type" : "korap:span",
-      "key" : "s"
-    }, {
-      "@type" : "korap:token",
-      "wrap" : {
-        "@type" : "korap:term",
-        "caseInsensitive" : true,
-        "key" : "wegen",
-        "layer" : "orth",
-        "match" : "match:eq"
-      }
+      "@type" : "korap:group",
+      "operation" : "operation:position",
+      "frame" : "frame:startswith",
+      "operands" : [ {
+        "@type" : "korap:span",
+        "key" : "s"
+      }, {
+        "@type" : "korap:group",
+        "operation" : "operation:class",
+        "class" : 1,
+        "operands" : [ {
+          "@type" : "korap:token",
+          "wrap" : {
+            "@type" : "korap:term",
+            "caseInsensitive" : true,
+            "key" : "wegen",
+            "layer" : "orth",
+            "match" : "match:eq"
+          }
+        } ]
+      } ]
     } ]
   }
 }
\ No newline at end of file