Which breakthrough NLP technique revolutionized sentiment analysis in 2018 by significantly improving contextual understanding of language?

Sentiment analysis tools have transformed how language and linguistics professionals understand consumer feedback. These technologies analyze text to determine emotional tone, helping companies respond to customer needs more effectively. This poll tests your knowledge about a pivotal moment in sentiment analysis technology that changed how we process language data at scale.

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BERT (Bidirectional Encoder Representations from Transformers)
Word2Vec embeddings
Doc2Vec document vectors
GloVe (Global Vectors for Word Representation)