Decoding using Domain Language Model in sherpa

[bsshruthi22]

We have trained a zipformer model with 3500 hours .We built a domain specific language model using n gram model using build_lm.py script. We found the performance same with and without LM. We tried decoding with sherpa using LG.pt
1.Please advice regarding performance.
2.How to use RNN language model in sherpa?

Thanks in advance.