Training set directory

This file contains the training set. It has 6 subdirectories with 5.000 invoices in each one. There are three files per invoice: invoice000(n).pdf has the content of bill (n) in PDF format; invoice000(n).json is the file with the true labels; and invoice000(n)_ann.pdf is the bill with annotations (the name of labels are placed around the corresponding value in the PDF file).