Yep: https://static.googleusercontent.com/media/research.google.com/en//archive/goog411.pdf https://static.googleusercontent.com/media/research.google.c... And

Yep: https://static.googleusercontent.com/media/research.google.com/en//archive/goog411.pdf https://static.googleusercontent.com/media/research.google.c... And also all of the time people talk to Google Home, Assistant, etc. Google Voice voicemails, and perhaps calls? Also, all of the audio and any recorded calls posted to YouTube.