Building adapted language models

[i_am_behrang at yahoo.com]

Hi,

Is there an option to give weights to certain training instances (sentences)?  For example if I have some sentences that are more relevant to my translation domain and I want them to influence the LM 4 times more than the rest of the data.

I've done this by repeating the more relevant training instances, which makes the model training quite slow.  Is there an alternative way in SRILM?

Thanks
Behrang