def _tag_in_string(source: str, start: str, end: str) -> bool:
    """Determine if a specific tag is in a string.

    :param source: String to evaluate
    :param start: String that marks the start of a tag
    :param end: String that marks the end of a tag
    :returns: Decision
    """
    if start not in source:
        return False

    if end not in source[source.index(start) + len(start) :]:
        return False

    return True