Function train 

pub(crate) fn train(
    qt: CxxQtThread<Sioul>,
    shared: Arc<Shared>,
    named: Vec<String>,
) -> String

“Train now”: your consent kept for the addresses its sentence named (named), then the corpus brought up to date and a training, on a thread of its own; spam_changed says how it goes. Why it did not start, else “”.