text: dataset_maps = dict()
  """
  each item in the dataset maps are a list of the following info
  (
  dataset_folder, 
  annotation file name (video dataset) / path of annotation file (image dataset), 
  split file name (video dataset) / path of image folder (image dataset) , 
  modality
  )
  """
  
  dataset_maps['TAO'] = ['TAO',
                         'anno_person.json',
                         'splits_person.json',
                         'video']
  
  dataset_maps['CRP'] = ['caltech_roadside_pedestrians',
                         'anno.json',
                         'splits.json',
                         'video']
  
  dataset_maps['MOT17_DPM'] = ['MOT17',
                               'anno.json',
                               'splits_DPM.json',
                               'video']
  
  dataset_maps['MOT17'] = ['MOT17',
                           'anno.json',
                           'splits.json',
                           'video']
  
  dataset_maps['AOT'] = ['airbone_object_tracking',
                         'anno.json',
                         'splits.json',
                         'video']
  
  dataset_maps['COCO17_train'] = ['mscoco',
                                  'annotations/MSCOCO2017_train_person.json',
                                  'images/train2017',   # all raw images would be in dataset_root/mscoco/images/train2017
                                  'image']
  
  dataset_maps['crowdhuman_train_fbox'] = ['CrowdHuman',
                                           'annotations/annotation_train_fbox.json',
                                           'Images',  # all raw images would be in dataset_root/CrowdHuman/Images
                                           'image']
  
  dataset_maps['crowdhuman_train_vbox'] = ['CrowdHuman',
                                           'annotations/annotation_train_vbox.json',
                                           'Images',
                                           'image']
  
  dataset_maps['crowdhuman_val_fbox'] = ['CrowdHuman',
                                         'annotations/annotation_val_fbox.json',
                                         'Images',
                                         'image']
  
  dataset_maps['crowdhuman_val_vbox'] = ['CrowdHuman',
                                         'annotations/annotation_val_vbox.json',
                                         'Images',
                                         'image']