How to train corefence module

[Byoung Kwon Lim]

Hi, all.

I recently research Open NLP coreference module.

My major is coreference in conversation.

But, There are some wrong result. So I want to train coreference module.

But, There are no document and data about training of coreference module.

Could you let me know How can I train coreference module/.

or

Where can I get information?

or

What is the format of train data?

Thank you.