Which AI translation innovation first introduced the 'attention mechanism' that revolutionized machine translation by allowing models to focus on specific parts of input sentences?

In recent years, artificial intelligence has transformed language translation services, making them more accessible and accurate than ever before. Major tech companies have been competing to create the most sophisticated neural machine translation systems, each with unique approaches to solving linguistic challenges. This poll tests your knowledge about a significant milestone in AI translation technology that changed how we approach machine learning for language.

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Google's Neural Machine Translation (GNMT)
The 'Transformer' architecture introduced in the 'Attention Is All You Need' paper
Microsoft's Z-code multilingual translation model
Facebook's MBART (Multilingual BART) system