Which AI algorithm breakthrough significantly improved machine translation accuracy for retail customer service applications in 2017, reducing translation errors by over 60%?

The field of machine translation has evolved dramatically with AI advancements. Modern language translation platforms use sophisticated algorithms to handle context, idioms, and cultural nuances that once required human translators. This poll tests your knowledge about a revolutionary advancement in NLP (Natural Language Processing) that transformed how retail and customer service industries implement multilingual support.

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Google's Neural Machine Translation (GNMT) with attention mechanisms
OpenAI's GPT-1 with transformer architecture
Facebook's Convolutional Sequence to Sequence Learning (ConvS2S)
Microsoft's BiLingual Evaluation Understudy (BLEU) scoring system