input: def create_web_scraper() -> None:
      """Create a web scraper that extracts specific data from a given website using the Python package BeautifulSoup. The scraper should parse webpages to find HTML elements using tags and attributes. Once the data is found, it can be converted into the desired format and stored.
      Example:
      To extract the URL from a list of webpages, the following code snippet can be used:
      >>> import requests
      >>> from bs4 import BeautifulSoup
      >>> webpage = requests.get("<url_of_webpage>")
      >>> soup = BeautifulSoup(webpage.content, 'html.parser')
      >>> links = soup.find_all('a')
      >>> for link in links:
      ...     print(link.get('href'))
      """
output:     import requests
      from bs4 import BeautifulSoup
  
      def extract_urls(url: str) -> List[str]:
          webpage = requests.get(url)
          soup = BeautifulSoup(webpage.content, 'html.parser')
          links = soup.find_all('a')
          return [link.get('href') for link in links if link.get('href')]
  
      def store_data(data: List[str], filename: str) -> None:
          with open(filename, 'w') as file:
              for item in data:
                  file.write(f"{item}\n")
  
      url = "<url_of_webpage>"
      urls = extract_urls(url)
      store_data(urls, "extracted_urls.txt")