Pertinent quote from [3] regarding "more challenging":
"You must also deploy custom NLP models, as the official ones will not be compatible. Use this setup only if you absolutely need custom Thingpedia interfaces, and cannot provide these interfaces on Thingpedia."
"You must also deploy custom NLP models, as the official ones will not be compatible. Use this setup only if you absolutely need custom Thingpedia interfaces, and cannot provide these interfaces on Thingpedia."