Update README.md

README.md

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 This repository contains trained model weigths from the paper "SPAN: a Simple Predict & Align Network forHandwritten Paragraph Recognition".
 
-Code: https://github.com/FactoDeepLearning/SPAN
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+Code: https://github.com/FactoDeepLearning/SPAN
+
+X.pt file is split as X.pt.parta, X.pt.partb, ...
+
+Original X.pt file can be obtained through:
+
+```
+cat X.pt.part* > X.pt
+```