I was just reading their concepts this morning: https://docs.api.ai/docs/concept-agents https://docs.api.ai/docs/concept-agents Do the agents actively process

I was just reading their concepts this morning: https://docs.api.ai/docs/concept-agents https://docs.api.ai/docs/concept-agents Do the agents actively process NLU out of the box, or is that something you need to train yourself?