diff --git a/timeline/week19.txt b/timeline/week19.txt
index 2431e6a6d160dd4e3587c838077996abd0c5b2de..214d723d4f3184c8d18cf5b2af3516f8d56a5923 100644
--- a/timeline/week19.txt
+++ b/timeline/week19.txt
@@ -31,5 +31,12 @@ Week 19 (04.05.-10.05.)
 	[ ]  look at other graph databases; we need to at
 	     least look at alternatives, right?
 
+[ ] broken IRIs
+
+	[ ] write down what's wrong exactly; it's not very helpful to
+	    just report that "something is wrong, is it?
+
+	[ ] report to authors of exporters
+
 References
 ==========