diff --git a/lib/formulas/_formula.rb b/lib/formulas/_formula.rb
index <HASH>..<HASH> 100644
--- a/lib/formulas/_formula.rb
+++ b/lib/formulas/_formula.rb
@@ -23,7 +23,11 @@ class Formula
     0
   end
 
+  def score_by_sentence(text_split, stats_split)
+    0
+  end
+
   def name
     'Generic'
   end
-end
\ No newline at end of file
+end
Add score by sentence to abstract base class