Error. Changed Gender by Sex

ml2/3_5_Exercise_1.ipynb

@@ -400,7 +400,7 @@
    "source": [
     "# Specific features for Children and Female since there are more survivors\n",
     "df['Children']   = df['Age'].map(lambda x: 1 if x < 6.0 else 0)\n",
-    "df['Female']     = df['Gender'].map(lambda x: 1 if x == 0 else 0)"
+    "df['Female']     = df['Sex'].map(lambda x: 1 if x == 0 else 0)"
    ]
   },
   {