<onto_stats>
   <num_concepts>16</num_concepts>
   <max_level>3</max_level>
   <num_leaf_concepts>13</num_leaf_concepts>
   <num_instances>697</num_instances>
   <max_num_instances_per_leaf_concept>188</max_num_instances_per_leaf_concept>
   <min_num_instances_per_leaf_concept>10</min_num_instances_per_leaf_concept>
   <max_num_immediate_children>7</max_num_immediate_children>
   <min_num_immediate_children>0</min_num_immediate_children>
</onto_stats>