Which NLP innovation first allowed retail chatbots to understand context across multiple customer messages, significantly improving the customer service experience?

In recent years, natural language processing (NLP) has revolutionized how retailers interact with customers. From advanced chatbots to sentiment analysis tools, linguistic AI has transformed customer experience in retail. This poll tests your knowledge about a groundbreaking development in retail AI that changed how language is processed in customer service applications.

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BERT (Bidirectional Encoder Representations from Transformers)
Word2Vec embedding
Recurrent Neural Networks (RNN)
Rule-based Natural Language Understanding (NLU)