def user_parse(data):
        """Parse information from the provider."""
        yield 'id', data.get('id') or data.get('user_id')
        first_name, _, last_name = data['name'].partition(' ')
        yield 'first_name', first_name
        yield 'last_name', last_name
        yield 'picture', data.get('profile_image_url')
        yield 'locale', data.get('lang')
        yield 'link', data.get('url')
        yield 'username', data.get('screen_name')
        city, _, country = map(lambda s: s.strip(),
                               data.get('location', '').partition(','))
        yield 'city', city
        yield 'country', country
Parse information from the provider.