input: Write a function to crawl a website for specific data, in this case, phone numbers. The function should accept a website URL as input and return a list of phone numbers found on the website. If no phone numbers are found, the function should return an empty list.
  assert crawl_website_for_phone_numbers('www.example.com')==['123-456-7890', '987-654-3210']
  assert crawl_website_for_phone_numbers('www.anothersite.com')==['555-555-5555']
  assert crawl_website_for_phone_numbers('www.nosuchdata.com')==[]
  assert crawl_website_for_phone_numbers('www.emptywebsite.com')==[]
  assert crawl_website_for_phone_numbers('www.wrongformat.com')==['555-55-55555']
output: import re
  import requests
  
  def crawl_website_for_phone_numbers(url):
      response = requests.get(url)
      phone_numbers = re.findall(r'\b\d{3}-\d{3}-\d{4}\b', response.text)
      return phone_numbers