input: Write a python function to parse a JSON string and extract the values of "name", "age", and "city".
  assert parse_json('{"name":"Alice","age":30,"city":"New York"}') == ("Alice", 30, "New York")
  assert parse_json('{"name":"Bob","age":25,"city":"Los Angeles"}') == ("Bob", 25, "Los Angeles")
  assert parse_json('{"name":"Charlie","age":35,"city":"Chicago"}') == ("Charlie", 35, "Chicago")
output: import json
  
  def parse_json(json_string):
      data = json.loads(json_string)
      return data["name"], data["age"], data["city"]