diff --git a/scripts/data_extraction.py b/scripts/data_extraction.py
index c610489..20de8ca 100755
--- a/scripts/data_extraction.py
+++ b/scripts/data_extraction.py
@@ -1513,6 +1513,7 @@ gene_LF3['mutation_info_orig'].value_counts()
 gene_LF3['dst'] = gene_LF3[drug] # to allow cross checking
 gene_LF3['dst'].equals(gene_LF3[drug])
 
+# populate dst_multimode
 gene_LF3['dst_multimode'] = gene_LF3[drug]
 
 gene_LF3[drug].isnull().sum()