Which NLP innovation first enabled major retailers to automatically analyze sentiment in customer reviews with over 90% accuracy, leading to widespread adoption around 2018-2019?

Natural Language Processing (NLP) has transformed how retailers understand customer needs and preferences. From sentiment analysis of reviews to chatbots that assist shoppers, language technologies have become essential tools in the retail arsenal. This poll tests your knowledge about a significant milestone in retail NLP development that changed how businesses analyze customer feedback at scale.

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BERT (Bidirectional Encoder Representations from Transformers)
Word2Vec embedding models
LSTM (Long Short-Term Memory) networks
GPT (Generative Pre-trained Transformer)