from typing import List


def _convert_tags_bio2plain(bio_tag_list: List[str]) -> List[str]:
    """
    retrieve plain tags by removing bio prefixes

    Args:
        bio_tag_list: e.g. ['O', 'B-ORG', 'I-ORG']

    Returns:
        tag_list:     e.g. ['O',   'ORG',   'ORG']
    """
    return [elem.split("-")[-1] for elem in bio_tag_list]