input: from typing import List
  
  def extract_url_from_webpages(urls: List[str]) -> List[str]:
      """ Extracts URLs from a list of webpages using BeautifulSoup.
      >>> extract_url_from_webpages(["http://example.com"])
      ['http://example.com/some_link1', 'http://example.com/some_link2']
      """
output:     from bs4 import BeautifulSoup
      import requests
  
      extracted_urls = []
      for url in urls:
          response = requests.get(url)
          soup = BeautifulSoup(response.text, 'html.parser')
          for link in soup.find_all('a'):
              href = link.get('href')
              if href and href.startswith('http'):
                  extracted_urls.append(href)
      return extracted_urls