[josephg]

Look at the author lists in the pdfs. Almost all of them are @google.com. They were Google employees when they wrote and published those papers.

[alecco]

Google Brain and Google Research are not DeepMind (an acquired company based in London). Transformers came out on 2017. Last year DeepMind was told to merge with the rest of Google AI (kinda). But it looks like they are still quite independent.

https://en.wikipedia.org/wiki/Google_Brain

https://en.wikipedia.org/wiki/Google_DeepMind

https://research.google/teams/