diff --git a/ml2/3_3_Data_Munging_with_Pandas.ipynb b/ml2/3_3_Data_Munging_with_Pandas.ipynb
index 6b713eb..2b21bb1 100644
--- a/ml2/3_3_Data_Munging_with_Pandas.ipynb
+++ b/ml2/3_3_Data_Munging_with_Pandas.ipynb
@@ -120,7 +120,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "We see some features have a numerical type (int64 and float64), and others has a type *object*. The object type is a String in Pandas. We observe that most features are integers, except for Name, Sex, Ticket, Cabin and Embarked."
+    "We see some features have a numerical type (int64 and float64), and others have a type *object*. The object type in Pandas is a String. We observe that most features are integers, except for Name, Sex, Ticket, Cabin, and Embarked."
    ]
   },
   {
@@ -164,7 +164,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Observe that some of the statistics do not make sense in some columns (PassengerId or Pclass), we could have selected only the interesting columns."
+    "Observe that some of the statistics do not make sense in some columns (PassengerId or Pclass); we could have selected only the interesting columns."
    ]
   },
   {
@@ -181,7 +181,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Selecting rows in a DataFrame"
+    "## Selecting rows in a DataFrame."
    ]
   },
   {