diff --git a/NOTES.md b/NOTES.md
index b89c4be7..ece11f1c 100644
--- a/NOTES.md
+++ b/NOTES.md
@@ -11,4 +11,5 @@ In od.json the coordinate string is missing a comma.
 "Capital": { "name": { "text": "Juba" }, "geographic coordinates": { "text": "04 51 N 31 37 E" },
 Should be "04 51 N, 31 37 E" to avoid problems down the line.
 It's the only example of this kind I found in my use of the repo so far.
+e.g. comma separator missing.