diff --git a/examples/01-blog/Blog/Data/DataSource.php b/examples/01-blog/Blog/Data/DataSource.php
index 39abe78..fdb0e24 100644
--- a/examples/01-blog/Blog/Data/DataSource.php
+++ b/examples/01-blog/Blog/Data/DataSource.php
@@ -104,6 +104,11 @@ class DataSource
         return isset($this->stories[$id]) ? $this->stories[$id] : null;
     }
 
+    public function findComment($id)
+    {
+        return isset($this->comments[$id]) ? $this->comments[$id] : null;
+    }
+
     public function findLastStoryFor($authorId)
     {
         $storiesFound = array_filter($this->stories, function(Story $story) use ($authorId) {
diff --git a/examples/01-blog/Blog/Type/CommentType.php b/examples/01-blog/Blog/Type/CommentType.php
index f4c4420..a432fdc 100644
--- a/examples/01-blog/Blog/Type/CommentType.php
+++ b/examples/01-blog/Blog/Type/CommentType.php
@@ -43,9 +43,17 @@ class CommentType extends BaseType
         ]);
     }
 
+    public function author(Comment $comment, $args, AppContext $context)
+    {
+        return $context->dataSource->findUser($comment->authorId);
+    }
+
     public function parent(Comment $comment, $args, AppContext $context)
     {
-        return $context->dataSource->findReplies($comment->id, $args['limit'], $args['after']);
+        if ($comment->parentId) {
+            return $context->dataSource->findComment($comment->parentId);
+        }
+        return null;
     }
 
     public function replies(Comment $comment, $args, AppContext $context)