for (i=1; i<size; i++)
for (DEPArc arc : tree.get(i).getSHeads())
if ((pvRoleset = pvRolesets[arc.getNode().id]) != null)
if (PTNumber.containsOnlyDigits(n = arc.getLabel().substring(1, 2)))
{
vnclss = new ArrayList<String>(pvRoleset.keySet());
Collections.sort(vnclss);
for (String vncls : vnclss)
if ((pvRole = pvRoleset.get(vncls).getRole(n)) != null)
arc.appendLabel(pvRole.vntheta);