def METHOD_NAME(qids_to_relevant_passageids, qids_to_ranked_candidate_passages):
    """Perform quality checks on the dictionaries
    Args:
    p_qids_to_relevant_passageids (dict): dictionary of query-passage mapping
        Dict as read in with load_reference or load_reference_from_stream
    p_qids_to_ranked_candidate_passages (dict): dictionary of query-passage candidates
    Returns:
        bool,str: Boolean whether allowed, message to be shown in case of a problem
    """
    message = ''
    allowed = True
    # Create sets of the QIDs for the submitted and reference queries
    candidate_set = set(qids_to_ranked_candidate_passages.keys())
    ref_set = set(qids_to_relevant_passageids.keys())
    # Check that we do not have multiple passages per query
    for qid in qids_to_ranked_candidate_passages:
        # Remove all zeros from the candidates
        duplicate_pids = set([item for item, count in Counter(qids_to_ranked_candidate_passages[qid]).items() if count > 1])
        if len(duplicate_pids-set([0])) > 0:
            message = "Cannot rank a passage multiple times for a single query. QID={qid}, PID={pid}".format(
                    qid=qid, pid=list(duplicate_pids)[0])
            allowed = False
    return allowed, message