input: def display_table_of_contents_from_database(database_data) -> str:
      """Generate an HTML page that displays a table of contents from the given database data.
      >>> display_table_of_contents_from_database(['Chapter 1: Introduction', 'Chapter 2: Methods', 'Chapter 3: Results'])
      '<html><body><ul><li>Chapter 1: Introduction</li><li>Chapter 2: Methods</li><li>Chapter 3: Results</li></ul></body></html>'
      """
output:     html_content = "<html><body><ul>"
      for item in database_data:
          html_content += f"<li>{item}</li>"
      html_content += "</ul></body></html>"
      return html_content