diff --git a/28.md b/28.md
index f37299e..0862e72 100644
--- a/28.md
+++ b/28.md
@@ -54,7 +54,7 @@ Clients SHOULD use [NIP-10](10.md) marked "e" tags to recommend a relay.
 ```json
 {
     "content": "{\"name\": \"Updated Demo Channel\", \"about\": \"Updating a test channel.\", \"picture\": \"https://placekitten.com/201/201\"}",
-    "tags": [["e", <channel_create_event_id> <relay-url>]],
+    "tags": [["e", <channel_create_event_id>, <relay-url>]],
     ...
 }
 ```
@@ -73,7 +73,7 @@ Root message:
 ```json
 {
     "content": <string>,
-    "tags": [["e", <kind_40_event_id> <relay-url> "root"]],
+    "tags": [["e", <kind_40_event_id>, <relay-url>, "root"]],
     ...
 }
 ```
@@ -84,8 +84,8 @@ Reply to another message:
 {
     "content": <string>,
     "tags": [
-        ["e", <kind_42_event_id> <relay-url> "reply"],
-        ["p", <pubkey> <relay-url>],
+        ["e", <kind_42_event_id>, <relay-url>, "reply"],
+        ["p", <pubkey>, <relay-url>],
         ...
     ],
     ...