Which linguistic feature was FIRST successfully implemented in retail AI assistants, fundamentally changing how consumers interact with online stores?

Retail AI has revolutionized how we interact with online stores through natural language processing and understanding. Virtual shopping assistants now help customers find products, answer questions, and make recommendations. But how well do you know the linguistic technology behind these retail innovations? Test your knowledge about the intersection of linguistics and retail AI in this challenging trivia question!

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Sentiment analysis (detecting customer mood from text)
Intent recognition (understanding what customers want to accomplish)
Dialect/accent accommodation (adapting to regional speech patterns)
Conversational memory (recalling previous interactions in a session)