input: Write a function to determine if it is possible to create a HTML page that displays a table of contents from data stored in a database. If it is possible, return 'Yes'. Otherwise, return 'No'.
  assert can_create_table_of_contents_from_db()=='Yes'
  assert can_create_table_of_contents_from_db()=='Yes'
  assert can_create_table_of_contents_from_db()=='Yes'
  assert can_create_table_of_contents_from_db()=='Yes'
  assert can_create_table_of_contents_from_db()=='Yes'
output: def can_create_table_of_contents_from_db():
      return 'Yes'