input: Write a python function to make a GET request to a given URL and return the response text.
  assert fetch_data("http://www.example.com") == "Expected response text from example.com"
  assert fetch_data("http://www.test.com") == "Expected response text from test.com"
  assert fetch_data("http://www.example.org") == "Expected response text from example.org"
output: def fetch_data(url):
      import requests
      response = requests.get(url)
      return response.text