input: Write a function that crawls a given website for phone numbers and returns a list of all found phone numbers in the format "XXX-XXX-XXXX". If no phone numbers are found, it should return an empty list.
  
  def crawl_website_for_phone_numbers(website):
      response = requests.get(website)
      phone_numbers = re.findall('\d{3}-\d{3}-\d{4}', response.text)
      return phone_numbers
  
  assert crawl_website_for_phone_numbers('www.example.com')==['123-456-7890', '987-654-3210']
  assert crawl_website_for_phone_numbers('www.no_phones_here.com')==[]
  assert crawl_website_for_phone_numbers('www.another_example.com')==['555-555-5555']
  assert crawl_website_for_phone_numbers('www.empty_response.com')==[]
output: 
  def crawl_website_for_phone_numbers(website):
      response = requests.get(website)
      phone_numbers = re.findall('\d{3}-\d{3}-\d{4}', response.text)
      return phone_numbers
  