How do I as group moderator remove current group owner?

Current yahoo group owner of list I moderate is inactive/AWOL, has been from the start, isn't reachable by e-mail and I need to remove her as owner. Is there anyway to do this? I've emailed her, but to no avail. This needs to be done for management of the group. I myself have been "un-official" owner from beginning, but currently moderate and completely oversee the group and it's members etc. Any advise is welcome.