input: Write a python function to classify a book title as 'Fiction' or 'Non-Fiction' based on the presence of certain keywords.
  assert classify_book("The Great Mystery Novel") == 'Fiction'
  assert classify_book("An Analysis of Quantum Mechanics") == 'Non-Fiction'
  assert classify_book("Adventures in Fantasy Land") == 'Fiction'
  assert classify_book("The History of the Roman Empire") == 'Non-Fiction'
output: def classify_book(title):
      fiction_keywords = ['Mystery', 'Novel', 'Adventures', 'Fantasy']
      non_fiction_keywords = ['Analysis', 'Quantum', 'History', 'Mechanics', 'Empire']
      
      for word in fiction_keywords:
          if word in title:
              return 'Fiction'
      
      for word in non_fiction_keywords:
          if word in title:
              return 'Non-Fiction'
      
      return 'Non-Fiction'  # Default classification if no keywords are found