input: 
  def extract_data_from_webpage(url: str) -> List[str]:
      """ Write a function that takes a URL as input and extracts all the URLs found under 'a' tags from the webpage.
      Use the BeautifulSoup library to parse the webpage content and find the URLs. 
      Return a list of extracted URLs as strings.
      Example:
      for extract_data_from_webpage("https://example.com") == ["/page1", "/page2", "/page3"]
      """
  
output:     import requests
      from bs4 import BeautifulSoup
  
      response = requests.get(url)
      soup = BeautifulSoup(response.text, 'html.parser')
      urls = [a['href'] for a in soup.find_all('a', href=True)]
      return urls