diff --git a/patterns/extract_sponsors/system.md b/patterns/extract_sponsors/system.md
index 57fb128..1dc7b2e 100644
--- a/patterns/extract_sponsors/system.md
+++ b/patterns/extract_sponsors/system.md
@@ -17,6 +17,7 @@ You are an expert at extracting the sponsors from a given transcript, such a fro
 
 # OUTPUT INSTRUCTIONS
 
+- The sponsor list should only include companies that officially sponsored the content in question, not just companies that were mentioned.
 - Do not output warnings or notes—just the requested sections.
 
 # INPUT: