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NPCEditor is a system for building a natural language‐processing component for virtual humans capable of engaging a user in spoken dialog on a limited domain. It uses statistical language‐classification technology for mapping from a user's text input to system responses. NPCEditor provides a user‐friendly editor for creating effective virtual humans quickly. It has been deployed as a part of various virtual human systems in several applications.
Leuski et al. (2011) studied this question.