input: Write a python function to fetch headers and links from a webpage.
  assert get_webpage_data('https://example.com')==(['Example Domain'], ['http://www.iana.org/domains/example'])
  assert get_webpage_data('https://www.python.org')==(['Welcome to Python.org'], ['https://www.python.org/about/'])
  assert get_webpage_data('https://www.wikipedia.org')==(['Wikipedia'], ['https://en.wikipedia.org/'])
output: def get_webpage_data(url):
      import requests
      from bs4 import BeautifulSoup
      
      response = requests.get(url)
      soup = BeautifulSoup(response.content, 'html.parser')
      
      headers = [h.text for h in soup.find_all('h1')]
      links = [a['href'] for a in soup.find_all('a', href=True)]
      
      return headers, links