<onto_stats>
   <num_concepts>34</num_concepts>
   <max_level>4</max_level>
   <num_leaf_concepts>28</num_leaf_concepts>
   <num_instances>1526</num_instances>
   <max_num_instances_per_leaf_concept>155</max_num_instances_per_leaf_concept>
   <min_num_instances_per_leaf_concept>2</min_num_instances_per_leaf_concept>
   <max_num_immediate_children>10</max_num_immediate_children>
   <min_num_immediate_children>0</min_num_immediate_children>
</onto_stats>