input: Write a function to generate a Python code for crawling a website for a specific type of data, in this case, phone numbers. The function should take the website URL and the type of data to crawl as input and return the extracted data.
  assert crawl_website_for_phone_numbers('www.example.com')==['123-456-7890']
  assert crawl_website_for_phone_numbers('www.anothersite.com')==[]
  assert crawl_website_for_phone_numbers('www.somedata.com')==['555-555-5555', '123-456-7890']
  assert crawl_website_for_phone_numbers('www.nodata.com')==[]
  assert crawl_website_for_phone_numbers('www.multiplephones.com')==['111-222-3333', '444-555-6666', '777-888-9999']
output: import re
  import requests
  
  def crawl_website_for_phone_numbers(url):
      response = requests.get(f'http://{url}')
      phone_numbers = re.findall(r'\b\d{3}-\d{3}-\d{4}\b', response.text)
      return phone_numbers