First off, sorry I was rude yesterday. I tried three different demos and all of them were asking for either FB login or something and got annoyed I couldn't try

First off, sorry I was rude yesterday. I tried three different demos and all of them were asking for either FB login or something and got annoyed I couldn't try it. Few questions. I am interested in question and answer service. Is there any related demo ? Specifically, a pre-trained knowledge base. Even better if you can allow anyone to ingest a knowledge into your cloud, train and have it running.