def aggregate_info(infoextractors):
    """
    Aggregates inforamtion extracted from multiple ``InfoExtractor``
    instances to one dictionary.

    :param infoextractors: list of values of ``information`` attribute
                           of different ``InfoExtractor`` instances.
    """
    result = {}
    for ie in infoextractors:
        for fname, extracted_info in ie.items():
            for info_name, info_instances in extracted_info.items():
                if result.get(info_name):
                    result[info_name] += info_instances
                else:
                    result[info_name] = info_instances
    return result
