How to convert FUNSD to XFUN format?

[yang0369]

Dear all, I am trying to train layoutLM Relation extraction model with FUNSD, as the RE model was pre-trained on XFUN, so I need to convert FUNSD to XFUN format, thus I would like to ask if anyone has any idea on how to convert the FUNSD to XFUN? Very much appreciated your help!

Ps: I have tried to build the conversion script, but am a bit confused with the derivation of word level bboxes, in another word, how can we derive the word level bboxes based on FUNSD? (because the texts in FUNSD is entity level instead of word level)