code: def _remove_boring_lines(text):
    
    lines = text.split("\n")
    filtered = [line for line in lines if re.match("[a-zA-z\"\']", line)]
    return "\n".join(filtered)
docs: Remove lines that do not start with a letter or a quote.
  
    From inspecting the data, this seems to leave in most prose and remove
    most weird stuff.
  
    Args:
      text: a string
    Returns:
      a string