[NTG-context] Poem with long verses

I can’t figure out how to typeset poems with very long verses. I know that I can use the lines environment for verses, but if a verse is long, it must be broken and the second line must be indented. It seems that the lines environment doesn’t wllow this. Anayway I would prefer a solution which avoids the lines environment. This means I would like to define two commands: \startVerse and \stopVerse. But I find no solution. How can this be realized in Kontext? In LaTeX with memoir it’s really easy.