diff --git a/etl/xml_survey_extraction/app.py b/etl/xml_survey_extraction/app.py
index 7f4e679c..edebbece 100644
--- a/etl/xml_survey_extraction/app.py
+++ b/etl/xml_survey_extraction/app.py
@@ -50,6 +50,11 @@ def main():
 
     # TODO: We now have detailed information about primary and secondary walls, so we should use this information
     #       in our recommendations when we have it
+    #       For example, for 77 Peryn Road, W3 7LT, the energy assessment has a main dwelling and two extensions, where
+    #       the physical dimensions and the fabric of each building is constructed in a way as if each building is
+    #       separate. We should use this information to make recommendations that are specific to each building
+    #       part, though the problem here is that while the fabric and dimensions are separate, the actual SAP, CO2, etc
+    #       figures span across the entire property.
 
     # For each property, we download the xmls and extract the data
     database_data = []