diff --git a/1-js/05-data-types/11-json/1-serialize-object/task.md b/1-js/05-data-types/11-json/1-serialize-object/task.md
@@ -2,9 +2,9 @@ importance: 5

---

-# Turn the object into JSON and back

-Turn the `user` into JSON and then read it back into another variable.

```js
let user = {

diff --git a/1-js/05-data-types/11-json/2-serialize-event-circular/solution.md b/1-js/05-data-types/11-json/2-serialize-event-circular/solution.md
@@ -26,5 +26,5 @@ alert( JSON.stringify(meetup, function replacer(key, value) {
*/
```

-Here we also need to test `key==""` to exclude the first call where it is normal that `value` is `meetup`.

diff --git a/1-js/05-data-types/11-json/2-serialize-event-circular/task.md b/1-js/05-data-types/11-json/2-serialize-event-circular/task.md
@@ -2,13 +2,13 @@ importance: 5

---

-# Exclude backreferences

-In simple cases of circular references, we can exclude an offending property from serialization by its name.

-But sometimes there are many backreferences. And names may be used both in circular references and normal properties.

-Write `replacer` function to stringify everything, but remove properties that reference `meetup`:

```js run
let room = {
-Original file line number
+Diff line change
@@ Expand Up / @@ -2,9 +2,9 @@ importance: 5 @@
     ---
-    # Turn the object into JSON and back
-    Turn the `user` into JSON and then read it back into another variable.
     ```js
     let user = {
@@ Expand Down @@
Original file line number	Diff line number	Diff line change
Expand Up		@@ -26,5 +26,5 @@ alert( JSON.stringify(meetup, function replacer(key, value) {
		*/
		```

		Here we also need to test `key==""` to exclude the first call where it is normal that `value` is `meetup`.