def ReadValidationFilenames(dataset, request_type):
    """
    Returns the validation filenames for this dataset/request type.
    @param dataset: the trace dataset
    @param request_type: which request type to return for this dataset
    """
    validation_list_filename = 'traces/{}/{}-validation-traces.txt'.format(dataset, request_type)
    with open(validation_list_filename, 'r') as fd:
        return fd.read().splitlines()