avoid pruning the global tree since it is nothing else than the tree of all already pruned glotto.trees
avoid pruning the global tree since it is nothing else than the tree of all already pruned glotto.trees

NESCent/dplace,shh-dlce/dplace,D-PLACE/dplace,shh-dlce/dplace,stefelisabeth/dplace,NESCent/dplace,stefelisabeth/dplace,D-PLACE/dplace,D-PLACE/dplace,shh-dlce/dplace,NESCent/dplace,NESCent/dplace,shh-dlce/dplace,stefelisabeth/dplace,stefelisabeth/dplace,D-PLACE/dplace