Which language processing technique revolutionized retail chatbots in 2018-2019 by enabling them to better understand customer intent in complex queries?

Natural Language Processing (NLP) has revolutionized how retailers interact with customers. From sophisticated recommendation systems to advanced chatbots, linguistics and language technology are now core components of the retail experience. This poll tests your knowledge about the intersection of language technology and modern retail solutions. Are you up to date with how linguistics is transforming customer engagement in the digital marketplace?

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BERT (Bidirectional Encoder Representations from Transformers)
Word2Vec embedding models
RNN (Recurrent Neural Networks) with LSTM cells
TF-IDF (Term Frequency-Inverse Document Frequency) vectors