Lists in HTML documents can be ordered or unordered, with elements of lists being identified with the tag. Write a Python function, extract_a_list, which takes a single argument: a string holding all the text from an HTML page with a list in it. Have the function return a Python list of all the entries in the HTML list. If there is no HTML list, an empty Python list should be returned. An example HTML file for testing can be found here: lists.html. Using this example, your code should return ["Alpaca","Cats"].