input: 
  from typing import List
  
  
  def extract_urls_from_webpages(urls: List[str]) -> List[str]:
      """ Extracts URLs from a list of provided webpages using the BeautifulSoup package.
      Uses BeautifulSoup to parse each webpage and finds all 'a' tags. Extracts the URLs
      from the 'href' attribute of these 'a' tags. Returns a list of all extracted URLs.
      Example:
      for extract_urls_from_webpages(["<url_of_webpage1>", "<url_of_webpage2>"]) == ["http://url1.com", "http://url2.net"]
      """
  
output:     from bs4 import BeautifulSoup
      import requests
  
      extracted_urls = []
  
      for url in urls:
          response = requests.get(url)
          soup = BeautifulSoup(response.text, 'html.parser')
          for a_tag in soup.find_all('a', href=True):
              extracted_urls.append(a_tag['href'])
  
      return extracted_urls