def get_poll_options(tweet):
    """
    Get the text in the options of a poll as a list
    - If there is no poll in the Tweet, return an empty list
    - If the Tweet is in activity-streams format, raise 'NotAvailableError'

    Args:
        tweet (Tweet or dict): A Tweet object or dictionary

    Returns:
        list: list of strings, or, in the case where there is no poll,
        an empty list

    Raises:
        NotAvailableError for activity-streams format

    Example:
        >>> from tweet_parser.getter_methods.tweet_text import get_poll_options
        >>> original = {
        ...             "created_at": "Wed May 24 20:17:19 +0000 2017",
        ...             "entities": {"polls": [{"options": [{"text":"a"},
        ...                                                 {"text":"b"},
        ...                                                 {"text":"c"}]
        ...                             }]},
        ...            }
        >>> get_poll_options(original)
        ['a', 'b', 'c']

        >>> activity = {"postedTime": "2017-05-24T20:17:19.000Z",
        ...             "body": "some tweet text"}
        >>> get_poll_options(activity)
        Traceback (most recent call last):
        ...
        NotAvailableError: Gnip activity-streams format does not return poll options
    """
    if is_original_format(tweet):
        try:
            poll_options_text = []
            for p in tweet["entities"]["polls"]:
                for o in p["options"]:
                    poll_options_text.append(o["text"])
            return poll_options_text
        except KeyError:
            return []

    else:
        raise NotAvailableError("Gnip activity-streams format does not" +
                                " return poll options")
Get the text in the options of a poll as a list
    - If there is no poll in the Tweet, return an empty list
    - If the Tweet is in activity-streams format, raise 'NotAvailableError'

    Args:
        tweet (Tweet or dict): A Tweet object or dictionary

    Returns:
        list: list of strings, or, in the case where there is no poll,
        an empty list

    Raises:
        NotAvailableError for activity-streams format

    Example:
        >>> from tweet_parser.getter_methods.tweet_text import get_poll_options
        >>> original = {
        ...             "created_at": "Wed May 24 20:17:19 +0000 2017",
        ...             "entities": {"polls": [{"options": [{"text":"a"},
        ...                                                 {"text":"b"},
        ...                                                 {"text":"c"}]
        ...                             }]},
        ...            }
        >>> get_poll_options(original)
        ['a', 'b', 'c']

        >>> activity = {"postedTime": "2017-05-24T20:17:19.000Z",
        ...             "body": "some tweet text"}
        >>> get_poll_options(activity)
        Traceback (most recent call last):
        ...
        NotAvailableError: Gnip activity-streams format does not return poll options