input: Write a python function to extract titles and descriptions from a given URL using BeautifulSoup.
  assert extract_titles_and_descriptions("https://www.example.com/") == (["Example Domain"], ["This domain is for use in illustrative examples in documents."])
  assert extract_titles_and_descriptions("https://www.python.org/") == (["Welcome to Python.org"], ["The official home of the Python Programming Language"])
  assert extract_titles_and_descriptions("https://www.wikipedia.org/") == (["Wikipedia"], ["Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation."])
output: import requests
  from bs4 import BeautifulSoup
  
  def extract_titles_and_descriptions(url):
      response = requests.get(url)
      soup = BeautifulSoup(response.content, 'html.parser')
      
      titles = [title.get_text() for title in soup.find_all('title')]
      descriptions = [meta.get('content') for meta in soup.find_all('meta', attrs={'name': 'description'})]
      
      return (titles, descriptions)