def METHOD_NAME(self, key, data):
    """
    Modify the intervals on a second loop once all the data has been collected. This is particularly useful for
    lists or sets of items that were collected.
    """
    # Ensure that all lists are sets (i.e. contain only unique values)
    data['Users of Hashtag'] = set(data['Users of Hashtag'])
    data['Mentions'] = set(data['Mentions'])
    data['Hashtags'] = set(data['Hashtags'])
    # Remove key (i.e. this particular hashtag) from set of hashtags in a given tweet
    data['Hashtags'].remove(key)
    # Collect Aggregate data
    data['Number of Unique Users w/ Tweets using Hashtag'] = len(data['Users of Hashtag'])
    data['Number of Unique Mentions used in Tweets w/ Hashtag'] = len(data['Mentions'])
    data['Number of Other Unique Hashtags used in Tweets w/ Hashtag'] = len(data['Hashtags'])
    # Rename and format lists
    data['Users w/ Tweets containing Hashtag'] = ', '.join(data.pop('Users of Hashtag'))
    data['Mentions in Tweets containing Hashtag'] = ', '.join(data.pop('Mentions'))
    data['Other Hashtags in Tweets containing Hashtag'] = ', '.join(data.pop('Hashtags'))
    data.pop('Created at Timestamp')
    return data