Fix typo

Mission610Solutions.ipynb

@@ -220,7 +220,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Now we'll create a list of all the years ranging from `min_year` to `max_year`. Our goal is to then how many prison breaks there were for each year. Since years in which there weren't any prison breaks aren't present in the dataset, this will make sure we capture them."
+    "Now we'll create a list of all the years ranging from `min_year` to `max_year`. Our goal is to then determine how many prison break attempts there were for each year. Since years in which there weren't any prison breaks aren't present in the dataset, this will make sure we capture them."
    ]
   },
   {