The information provided by Appian says that Appian AI is part of the whole system by default when you sign up for Appian. However, I've been told that the service is not free but there is no information as to how much it costs. And they don't provide any links to the google prices page either. I found the following link from google but not sure if this one is correct: https://cloud.google.com/natural-language/pricing
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