diff --git a/src/preprocessing.py b/src/preprocessing.py
index c179e71..0dcc9bf 100644
--- a/src/preprocessing.py
+++ b/src/preprocessing.py
@@ -1,5 +1,6 @@
 from pandas import read_csv
 from sklearn.preprocessing import LabelEncoder
+from sklearn.model_selection import KFold
 
 
 def replace_values(df):
@@ -12,7 +13,13 @@ def replace_values(df):
 def process_na(df, action):
     if action == "drop":
         return df.dropna()
-    return replace_values(df)
+    elif action == "fill":
+        return replace_values(df)
+    else:
+        print("Unknown action selected. The choices are: ")
+        print("fill: fills the na values with the mean")
+        print("drop: drops the na values")
+        exit()
 
 
 def encode_columns(df):
@@ -23,8 +30,20 @@ def encode_columns(df):
     return encoded_df
 
 
+def split_train_target(df):
+    train_data = df.drop(labels="Severity")
+    target_data = df["Severity"]
+    return train_data, target_data
+
+
+def split_k_sets(df):
+    k_fold = KFold(shuffle=True, random_state=42)
+    return k_fold.split(df)
+
+
 def parse_data(source, action):
     df = read_csv(filepath_or_buffer=source, na_values="?")
     processed_df = process_na(df=df, action=action)
     encoded_df = encode_columns(df=processed_df)
-    return encoded_df
+    test_data, target_data = split_train_target(df=encoded_df)
+    return test_data, target_data