why use the reverberated speech signal as the training target

[flytair]

hi, it a great amazing project, thanks for your effort. When I looked at the code, I found that the training target signal was reverberated speech. (https://github.com/Audio-WestlakeU/NBSS/blob/af66db92bb9d6f72f7100d613d3df38c40b10b09/data_loaders/ss_semi_online_dataset.py#L294C27-L294C27) I wander why not use clean speech as the training target, as it would not only separate speakers, but also remove reverberation and even noise.