diff --git a/analyse_properties/__init__.py b/analyse_properties/__init__.py
index dab7851..3bce574 100644
--- a/analyse_properties/__init__.py
+++ b/analyse_properties/__init__.py
@@ -17,7 +17,7 @@ def csv_reader(csv_file):
     return csv.reader(io.TextIOWrapper(csv_file.open()))
 
 
-def slicer(element, *ranges):
+def slice_by_range(element, *ranges):
     return chain(*(islice(element, *r) for r in ranges))
 
 
@@ -27,12 +27,18 @@ class SplitPAON(beam.DoFn):
 
         if len(paon_split) == 0:
             return element
-        elif len(paon_split) == 1:
-            pass
-        else:
+        elif len(paon_split) > 0:
             pass
 
 
+class DropEmptyColumn(bean.doFn):
+    def __init__(self, index):
+        self.index = index
+
+    def process(self, element):
+        column = element[self.index]
+
+
 def main():
     csv_data = resources.path(
         "analyse_properties.data", "pp-monthly-update-new-version.csv"
@@ -53,7 +59,7 @@ def main():
         clean = (
             load
             | "Drop unneeded columns"
-            >> beam.Map(lambda element: list(slicer(element, (1, 4), (7, 14))))
+            >> beam.Map(lambda element: list(slice_by_range(element, (1, 4), (7, 14))))
             | "Convert to Upper Case"
             >> beam.Map(lambda element: [e.upper() for e in element])
             | beam.Map(print)