Update README.md

README.md

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-# Dataset Card for Pages of Early Soviet Performance (PESP)
+# Dataset Card for Pages of Early Soviet Performance (PESP)
+
+This dataset was created as part of the [Early Soviet Performance](https://cdh.princeton.edu/projects/pages-early-soviet-performance/) project at Princeton and is an effort to generate useful research data from a previously scanned [collection of illustrated periodicals](https://dpul.princeton.edu/slavic/catalog?f%5Breadonly_collections_ssim%5D%5B%5D=Russian+Illustrated+Periodicals) held by Princeton's Firestone Library.  Our work focused on document segmentation and the prediction of images, text, and mixed text in the document images.  The mixedtext category refers to segments where the typeface and text layout are mixed with other visual elements.  At a practical level, this category identifies sections that present problems for OCR. It also highlights the experimental use of text, images, and other elements by the editors and has research value.
+
+For each of the images in Princeton's digital collections (DPUL)  
+    
+'filename', 'dpul', 'journal', 'year', 'issue', 'uri', 'yolo', 'yolo_predictions', 'text', 'images_meta'