Which NLP breakthrough technology, released in 2018, revolutionized e-commerce product search and language understanding by introducing bidirectional context in text analysis?

Natural Language Processing (NLP) has transformed how businesses interact with customers through various platforms and technologies. This product trivia challenges you to test your knowledge about a pivotal development in the evolution of language technology that revolutionized e-commerce platforms and customer service interfaces. Do you know which innovation marked a turning point for language understanding in digital products?

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BERT (Bidirectional Encoder Representations from Transformers)
Word2Vec (Word to Vector)
GPT (Generative Pre-trained Transformer)
ELMo (Embeddings from Language Models)