def get_roi_names(contour_data):
    """
    This function will return the names of different contour data, 
    e.g. different contours from different experts and returns the name of each.
    Inputs:
        contour_data (dicom.dataset.FileDataset): contour dataset, read by dicom.read_file
    Returns:
        roi_seq_names (list): names of the 
    """
    roi_seq_names = [roi_seq.ROIName for roi_seq in list(contour_data.StructureSetROISequence)]
    return roi_seq_names