Hi,
I have tried to test BioSolr.
I have also run to Part Seven: Ontology-powered search.
But I cannot get 150 results with the key words "mental disorders" plus the option "Include child labels". However, I got 5 results with that key words and the option "Include parent labels".
Please see the attached image.

The question is whether you made a mistake in the instruction or the fault comes out my configuration.