input: From: [Unknown]
  To: [Unknown Email]
  Subject: [Unknown Subject]
  
  Hello,
  
  This email is an example of a data analysis and text cleaning task.
  
  [Appropriate sign-off],
  [Unknown Name]
  [Unknown Signature or Title]
  
  ## Your Response
  
  Based on your analysis, respond ONLY with "Yes" or "No".
  