diff --git a/spark/spark.ipynb b/spark/spark.ipynb
index be85a76..0fa8c6d 100644
--- a/spark/spark.ipynb
+++ b/spark/spark.ipynb
@@ -140,7 +140,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Display the data in the data:"
+    "Return all the elements of the dataset as an array--this is usually more useful after a filter or other operation that returns a sufficiently small subset of the data:"
    ]
   },
   {