document_image,document_text
https://s3.amazonaws.com/pub_demo/fake-invoices/png/invoice1.png,https://s3.amazonaws.com/pub_demo/fake-invoices/html/invoice1.htm
https://s3.amazonaws.com/pub_demo/fake-invoices/png/invoice2.png,https://s3.amazonaws.com/pub_demo/fake-invoices/html/invoice2.htm
https://s3.amazonaws.com/pub_demo/fake-invoices/png/invoice3.png,https://s3.amazonaws.com/pub_demo/fake-invoices/html/invoice3.htm
https://s3.amazonaws.com/pub_demo/fake-invoices/png/invoice4.png,https://s3.amazonaws.com/pub_demo/fake-invoices/html/invoice4.htm
https://s3.amazonaws.com/pub_demo/fake-invoices/png/invoice5.png,https://s3.amazonaws.com/pub_demo/fake-invoices/html/invoice5.htm
https://s3.amazonaws.com/pub_demo/fake-invoices/png/invoice6.png,https://s3.amazonaws.com/pub_demo/fake-invoices/html/invoice6.htm